June 28th, 2006, 09:05 PM
PDF Rainbow Table
Are there any programs that use rainbow tables to crack PDF’s? I wanted to write some but do now know how they are cracked.
Jive Lady: Jus\' hang loose, blood. She gonna catch ya up on da\' rebound on da\' med side.
Second Jive Dude: What it is, big mama? My mama no raise no dummies. I dug her rap!
Jive Lady: Cut me some slack, Jack! Chump don\' want no help, chump don\'t GET da\' help! Jive ass dude don\'t got no brains anyhow! Hmmph!
June 28th, 2006, 10:23 PM
The older pdf encryption schemes were very weak, and mainly relied on encryption thru obscurity and can be cracked very easily with a 100% success rate. Just goolge around a bit to learn the algorithm specifics...
As far as newer and more recent versions. I beleive they use the RC4 algorithm, so this is going to require a little more work. Basically the idea is to attempt to brute force the pdf, and after every attempted decryption, you check the file to see if it conforms to a valid pdf format. If it doesn't you try another password from the table, and repeat until you get a valid pdf format...Either way, it's a lot of work...
Have you tried googling for a pdf cracker yet?
We are a generation without a middle. We have no great war or depression. Our war is a spiritual one, our depression is our lives. We were all raised to believe that we\'ll all be millionaires and rockstars - But we won\'t.
And we are slowly learning this fact...And we are VERY pissed off about it!