You guys might have encountered PDF files with password protection sometime or the other.

Its easier to hack those password protected files now with UBuntu.

You wouldnt be needing those KD sucking software anymore.

Go to console/terminal, type the following code.

$ pdftops protected.pdf out.ps
$ pstopdf out.ps out.pdf

Where,

protected.pdf is the protected PDF file

out.ps is an intermediate output of the protected PDF file

out.pdf is the final cracked PDF file

Thats it for the day. More hacks to come.