How to crack PDF file passwords using John The Ripper

 #TheStarkArmy

How to crack PDF file passwords using John The Ripper ❓

Real life story

Once a guy gave me an encrypted PDF file and told to crack it. He said it contained an important file and password is
a date of birth he didn't know whose

What stuff I had❓

♦️ Kali Linux(Penetration OS)

♦️ John The Ripper(password cracking tool)

Why John ❓

John is basically one of the best password cracking tools
existing in this world. It can crack almost any encrypted stuffs

How to use ❓

First we're gonna make a hash of the file. My file is in the Desktop
folder.
The hash creator tool's name is  
pdf2john.pl

⭕️ In Kali, John can be launched from anywhere since it's in Binaries folder.
But hash creator tool is in the John folder

⭕️ So i needa locate it

root@kali~#: locate pdf2john.pl

And I got the location to be

/usr/share/john/pdf2john.pl

⭕️ Next cmds

root@kali~#: cd /usr/share/john

root@kali~#: ./pdf2john.pl /root/Desktop/file.pdf > /root
Desktop/hash.hash

⭕️ The first argument contains the location of the file, and the second argument mentions where to store the hash file

🌀 Creating wordlist

That guy told that its a DOB, so I am gonna use crunch to create a wordlist

root@kali~# crunch 8 8 1234567890 -0 /root/Desktop/wordlist.lst

⭕️ Length of DOB is 8. So I mentioned 8. In order to get all the guesses, I mentioned
digits from 0 to 9. And file size was 848MB ❗️

🌀 Fire up John The Ripper🔥   

⭕️ Follow the below commands

root@kali~#: cd Desktop
 (Where our hash file is located)

root@kali~#: john --wordlist=wordlist.lst hash.hash

It will take a while but crack the password
ENJOY ❤️

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