• Top 10 PDF cracks
• DRM restriction removal
• How to hack 'protected' PDF

Easiest way is to get its password. If you didn't know then follow these methods 1. You need to have a Google drive account. The whole process is very simple, you need to upload your encrypted PDF files to Google Drive and convert it to a Word(doc.

Top 10 ways to unlock secure, protected PDF files, such as college eBooks, for easy offline viewing on mobile devices. Convert images to PDF, and more.

What are PDF Files?

According to Wikipedia, the Portable Document Format (PDF) format is a subset of the PostScript format that concentrates on layouts and graphics, including compression, encryption, and embedded fonts. This makes sense having read somewhere that there is usually no problem with renaming .pdf files to .ps and treating them as PostScript for programs and scripts that operate on those types of files. Furthermore, one could surmise that renaming .ps files to .pdf is probably a bad idea because .ps files may contain additional capabilities not found in the PDF specifications. Adobe graciously allows royalty-free hacking of their patented PDF format by lowly software developers like us.

Why Cracking is Necessary

If somebody creates a PDF and then forgets the password, they need some way to recover the lost password.

Some school or company eBooks can not be opened or viewed without an active Internet connection to unlock content. This presents a problem for students and professionals who travel, or are otherwise not always online.

Once unlocked, some PDFs can be viewed offline, but only from within Adobe Reader Reader, and only if they reside in the same folder in which they were decrypted. This presents problems for readers who don't like Adobe, and those who use removable drives or habitually organize their folders.

The remote host required by the protected PDF plugin will not be there forever. Hence, remotely-locked and protected PDF files will eventually quit working. They are like books that must be returned to the library. If they were purchased they should be converted into a plain, unencrypted format ASAP!

Once opened, most remotely-locked and protected PDFs allow printing. A clever person might try printing to a PostScript file, but the resulting PostScript file is still protected against ps2pdf converting it back to PDF.

Why Cracking is Not Necessary

This information is provided for personal, professional, and educational use only! The companies involved have released newer software, so we can read these documents on our devices without resorting to hacks. Illegally distributing Copyrighted material is illegal in most parts of the world. Depending on the locale, there could be additional penalties for cracking PDF passwords, or removing digital rights management (DRM) restrictions in connection with distribtion. We assert our basic human rights, including the right to customize material that we created, bargained for, or purchased. We expect to be able to modify our digital assets for our own uses, such as for offline presentation on other devices. We also expect to be able to gift, donate, loan, and even re-sell our dog-eared eBooks to friends as one would anything else, such as 'books.' That said, even asserting ones own digital rights these days could lead one into trouble. Many companies and schools have policies against using their computers for resource-intensive tasks such as cracking passwords. If there are any questions seek professional legal counsel.

Why Use Free and Open Source Tools?

Most PDF unlocker programs found on the Internet today are proprietary. That is they are programs for which no source code can be viewed. It is not good practice to go around downloading and running proprietary software. These programs could contain anything. Just because they pass a virus scan, or cost a lot, does not mean they are safe. New viruses, bugs, and backdoors are made all the time. At least with open source there are many eyes presumably reviewing the code. The mere presence of source code does not guarantee absolute safety. Therefore, the best security practice is to review and compile the code for oneself, or rely on a trusted software distribution center, or distro, to review and compile the code and provide signed binaries for download.

PDF Encryption

Our research indicates that there are at least three broad, general types of protections for PDF files.

• User password - Password required to decrypt and open PDF file
• Owner password - Security signatures prevent copying, etc...
• 3rd party JS - Content unlocked via the Internet.

PDF unlocker programs found on the Internet today only deal with user password and owner passwords. None of these programs deal with PDF files that encrypt the content using 3rd party plug-ins (but we can remove the plugins using free and open source tools, provided that we can use the password first to unlock and permit the plugin to download the secret content).

PDF files with 3rd party plug-ins have a login page on page 1, where the viewer enters their username and password. The remaining pages appear blank until they are unlocked.

3rd party plug-ins employ JavaScript (JS) on the password page to send the password or certificate to a 3rd party server. This requires an active Internet connection. If the computer is offline, Adobe Reader will respond with a not-so-friendly 'unknown error' and can't open the PDF. Once connected and the unlock request finally gets through, the 3rd party server verifies the login and either responds with the actual content, or exchanges a certificate to unlock the file contents for viewing. From that point on, Adobe's reader may prevent access if the file has been copied to another device, or even to another location on the same PC. Additional JS may track the file whenever and wherever it is opened, reporting potential Copyright violations.

Usually a document that uses 3rd party JS is also restricted using one or more of the following security signatures as well.

Security Signatures

According to PDF Rights Management, Adobe's questionable implementation of Digital rights management (DRM) controls and security signatures started with allowing the creation of documents with any of the following restrictions:

• printing
• modification
• copying
• adding / changing comments or form fields

Later PDF restriction possibilities were refined to include restricting assembly, extraction for accessibility, commenting, filling in form fields, signing, or template creation. Starting with PDF 1.5 these permissions are managed by usage rights (UR) signatures (Wikipedia).

Now on to the hacks.

Hack Number 1

Tools: Web Browser, Bookshelf

Target: All

Students using the popular Bookshelf online ebook viewer web page can print copies using 'print frame' or 'save frame' techniques. Bookshelf's print button may say something like, 'printing of this title is restricted to two pages at a time,' with restrictions set by publisher. Simply open the book in Bookshelf's online viewer, right-click on the frame containing the book or chapter, choose 'this frame', and either 'print frame', or 'save frame'. Voila! All pages are printed or saved. This is confirmed to work on Firefox and Chrome web browsers, printing, or saving to any of HTML, PostScript, or PDF formats.

Not using Bookshelf? Find an unencrypted copy of the ebook viewable or downloadable online. With so many file sharing sites, ebook readers, and search engines out there, one can find earlier versions, or unencrypted copies of just about anything free or cheap. Dig through Google Books, Amazon, Pastebin, Bearshare, Pirate Bay, The Dark Web. Gopher. FTP it. Usenet still exists...

Caution: Proprietary Viewers. The installable Bookshelf app (not to be confused with the Bookshelf web page we just used) purports to download ebooks for offline viewing on Windows, iOS, OSX, Android, and Kindle. This requires purchase and activation of Bookshelf app on up to two machines. It is doubtful that the resulting downloads can be copied or shared as they would remain encrypted and controlled within the Bookshelf downloads folder where they can spy on users and report on their whereabouts when opened. Bookshelf apps appear to be proprietary and not recommended.

Hack Number 2

Tools: Adobe Reader, qpdf and Ghostscript's ps2pdf

Target: 3rd party JS, content restrictions.

This method entails first downloading the PDF ebook, and running qpdf on the download using the --qdf option to normalize and uncompress the data. Once normalized and uncompressed, the PDF may be unlocked from within Adobe Reader and printed to file. The resulting PostScript file is unprotected and may be freely redistilled (converted) back to PDF with Ghostscript's ps2pdf. Presto. No more 'Redistilling encrypted PDF is not permitted' message!

Hack Number 3

Tools: Adobe Reader, sed, and Ghostscript's ps2pdf

Target: 3rd party JS, content restrictions.

Hack Password Protected Pdf Mac Torrent

This method entails using Adobe Reader to unlock the file via the Internet in the usual way and then print to file. The resulting PostScript file is protected and has to be hacked with sed before it can be redistilled (converted) back to PDF with Ghostscript's ps2pdf. The conversion process runs very slowly because of PostScript errors introduced from the sed hack, but it is good for small chapters when technique #1 does not work, or when qpdf can not be installed on the system.

Hack Number 4

Tools: pdfcrack

Target: password-protected PDF

Bonus: Free and Open Source

Drawback: Not for 3rd party JS

If somebody creates a PDF and then loses the password, they can recover the password with the pdfcrack command line password recovery tool. The tool leverages a brute force attack against the PDF password until it opens. The attack proceeds offline and nothing is exchaned via the Internet. Owner passwords can be found with the -o switch. Password cracking of longer passwords can take days or weeks to crack, so we limit the password length to 9 characters. This hack can not and does not work over the Internet with content locked by a 3rd party JS plugin. How could it? It would have to hack into the 3rd party server to do that!

Hack Number 5

Tools: Google Drive

Target: password-protected PDF

Drawbacks: 2Mb file size, Not for 3rd party JS

Upload the owner password protected PDF to Google Drive. Google will convert the PDF for viewing online. Google Drive limits uploads to 2Mb.

Hack Number 6

Tools: Foxit Reader, CutePDF

Target: 3rd party JS, content restrictions

Drawbacks: Proprietary software. Relies on bugs.

Download Foxit Reader and CutePDF Writer. Unlocked PDF files can currently be printed to PDF from within Foxit Reader by selecting the CutePDF device from the list of available printers. This hole may become patched in later versions.

Hack Number 7

Tools: Adobe Reader, Microsoft XPS Viewer, CutePDF

Target: 3rd party JS, content restrictions

Drawbacks: Proprietary software. Relies on bugs.

Install Microsoft XPS Document Writer. Open the protected PDF in Adobe Reader reader. Print the file choosing the Microsoft XPS Document Writer from the list of available printers. Use XPS Viewer to open the resulting XPS file. Now print to PDF using CutePDF. This hole may become patched in later versions.

Hack Number 8

Tools: Ghostscript, GSView

Target: content restrictions

Install Ghostscript and GSView. Change the extension of the PDF file to .ps and open with GSView. If .ps file can be opened and viewed, it can be saved as a PDF file. Resulting PDF is free of restrictions, including restrictions on printing.

Hack Number 9

Tools: Web browser

Target: password-protected PDF

Visit the PDF Unlocker web site. Select the PDF file to unlock and let it upload to the server. Click the Download button to obtain the unlocked PDF file.

Hack Number 10

Tools: Web browser

Target: password-protected PDF

Drawbacks: Proprietary software. Not for 3rd party JS

Various 'unlocker' programs exist on the Internet. Search for PDF password recovery. Proprietary software alert. Caveat emptor (buyer beware). These programs do not really unlock 3rd party JS plugins. Some demos available online even spend a minute conducting a fake test that pretends to open the file. They say the PDF can be unlocked, but then, after purchase, these programs unlock file passwords only. They do not actually work against 3rd party JS server passwords. How could they? They would have to hack the server to do that. While server hacking is certainly possible, it is beyond the scope of this howto.

Summary

Many of these techniques involve opening a PDF file from within Adobe Reader, allowing JavaScript to unlock it, and then printing it to file. There are many ways to print to PostScript or PDF, and literally hundreds of ways to break the restrictions on the resulting files. Earlier methods that no longer work include using Ghostscript to convert the PDF (or PostScript) file to earlier versions of PostScript, and then back to PDF. Those earlier PostScript drivers have been deprecated, but older versions of Ghostscript still provide them.

Convert to PDF When All Else Fails

Tools: Web browser

Target: content restrictions

Some PDFs won't allow printing or saving, and some of them are timed access. If it can be viewed, it can be screen captured. Simply open it up, preferably on a large desktop that can be tilted to where it shows the whole page, and take a screenshot of each page. It might be a good idea to empty out the screenshots folder first! Hopefully this will create a series of numbered images there. Then use something like imagemagick to convert the series of numbered images into a PDF file. The result might be great, or not so pretty depending on the desktop resolution, page dimensions, and other factors. The document can not be text searched because it is composed out of images, but there are programs that can optically recognize the text, and create a searchable index for PDF files. Hope this helps!

Links

Adobe Reader
Foxit Reader
CutePDF
pdfcrack command line password recovery tool
How to Unlock a Secure PDF File
PDF Rights Management
Portable Document Format

What if you have an old password-protected PDF file whose password you do not remember any longer? What if you need to access the file urgently? No need to worry as there are a few ways to decrypt the PDF file and bypass the password. In this article we will discuss various methods to remove security password from the PDF files.

Method 1: Google Chrome to Crack PDF Password

You can use Google Chrome to remove the password from PDF. But, this method will only work if you already know the password. If you do not know the password, skip to the next method in this article. Chrome comes packed with a native PDF reader and does not require any additional plugin. You can open the password protected file in Chrome browser and then save it on your hard disk sans the password. Here are the simple steps:

1. Open Chrome browser on your computer.

2. Locate the PDF file you wish to crack the password from on your hard disk.

3. Drag and drop the file onto the Chrome Window.

4. Chrome will now begin to render the file. Enter the PDF file password when prompted by Chrome. You should now be able to see the file within the Chrome Window

5. Press CTRL + P (if you are using Windows PC. If you are using Mac, press CMD + P) to bring up the print menu.

6. On the left pane, under ‘Destination' press ‘Change' button.

7. Choose ‘Save as PDF' as the new destination on the popup Window.

This will be it! The new file will be saved on your hard drive and it will be without any password protection.

Method 2: The Best Solution to Crack Password from PDF Document - Dr.PDF

How To Password Protect Pdf Free

As we know there are two kinds of password that can be used on PDF file, Owner password and user password. Many online PDF password breaker service will only help you break owner password. But not crack open password, we highly recommend using iSeePassword Dr.PDF which is one of the best password break tool you will find. It helps you break PDF passwords as well as any other restrictions. Whether the PDF file has the owner password or master password, this incredible program will take care of all.

Just download the trail and try to crack PDF security password all by yourself. Easy, and safe, never damage to your original PDF data.

Part 1 Crack Open Password from PDF File

Download and install PDF Password Cracker on a computer. After you download the program on your computer, install and run it, then you will see the main interface like blow.

Here we will use the first option to recover open password. Click 'Add File' button to import your PDF document. Then you will be asked to select a type of attack, do not be intimidated! This is just for recover your file password instead of damaging your data.

You can choose between Brute Force Attack, Mask Attack, Dictionary Attack. We recommend you choosing Mask Attack because it can improve the chance of finding your password. Click the settings button to make parameters.

Once your finish the parameters then click Start button, then waiting! It may take a little longer if the password is file is actually a lot more complicated.

Once the password is found, you will get a messages with Congratulation word. Then you can now use the found password to open your PDF document without any issue.

Add Password To Pdf Mac

Part 1 Crack Owner Password from PDF File to Edit, Modify or Print

Open the Dr.PDF again and choose the second option.

Click the Add File button to import PDF files. You're allowed to add up to 200 file a time. Even though the program still shows consistency in play and never crashed. There are two ways to saved the exported PDF files, one is save the target PDF on the source folder. It means you can save the PDF on the folder where the source file are. You can also specify an output folder for the exported PDF files.

NOTE: You're allowed to clear the imported PDF lists by clicking Remove button on the top toolbar.

Start to Break PDF Password Now! After you imported the PDF files and specify the output folder, just click the Start button to begin the breaking process. If there is a lock icon appearing on the PDF item bar, it means the imported PDF file is protected by open user,then you will be asked to type the Open password in the pop up window.

Method 3: Use One of the Free Online Tools to Crack PDF Password

If you don't know the password of the PDF file, Method 1 will not work. Thankfully, there are several online tools that let you crack the password of various types of PDF files. Some of these tools also allow you to select multiple files at a time. This saves you effort and time. But, there are some serious drawbacks of using the free online tools. First of all, most such free tools restrict password crack to PDF files of certain size. For instance, you may not be able to crack the password if the file size exceeds 100 MB. You also need high speed internet connection to process multiple files.

You can check these online PDF password cracker sites:

1. http://freemypdf.com/

2. https://www.pdfunlock.com/

3. https://foxyutils.com/unlockpdf/

One of the biggest challenges is that you cannot always trust these tools. There are some sites that end up sneaking in the malicious programs to your computer. That's certainly not what you want.

If you are still using the free online tools, here are the generic steps to crack the PDF password:

1. Open the web browser on your computer and visit the website which you intend to use to crack PDF password.

Hack Password Protected Pdf Mac Download

2. Click the button 'Select Files' or 'Open Files' (the button label may vary across sites). The 'Open' dialogue box should appear.

3. Select the PDF file (or files) from which you wish to remove the password.

4. Click 'Open' button at the bottom and wait for the website to complete the process.

If you are lucky, the website will process all the files successfully. However, more often than not, you may encounter an error message. These websites are not very effective. So, what is the solution? Look at the method 3.

When you receive a password-protected PDF file in email, the file text is unsearchable. Also, you may have an old file whose password you may have forgotten. In both the cases, you can use the methods outlined above to crack the password.

Hack Password Protected Pdf Mac Software

Hack Password Protected Pdf Mac Download

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