pdfcrack is a command line, password recovery tool for PDF-files.
PDFCrack is a GNU/Linux (other POSIX-compatible systems should work too) tool
for recovering passwords and content from PDF-files. It is small,
command line driven without external dependencies.
The application is Open Source (GPL).
Enable snaps on Ubuntu and install pdfcrack-simosx
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.
Snaps are discoverable and installable from the Snap Store, an app store with an audience of millions.
For versions of Ubuntu between 14.04 LTS (Trusty Tahr) and 15.10 (Wily Werewolf), as well as Ubuntu flavours that don’t include snap by default, snap can be installed from the Ubuntu Software Centre by searching for snapd.
Alternatively, snapd can be installed from the command line:
sudo apt update
sudo apt install snapd
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.
Install pdfcrack-simosx
To install pdfcrack-simosx, simply use the following command: