Don’t know how to use PassRec for PDF to crack password-protected PDF files? Here is how:
Step 1: Download and install.
Click here to download PassRec for PDF, and set it up on your Windows computer, and open it. The home screen looks like below:
Step 2: Choose targeted files and unlock methods.
Drag the PDF file you want to unlock, and drop it to the blank space on the left side of the home screen.
On the right side, choose a password cracking method that fit your file the best, and click Next.
If you choose the Combination Attack method to, that means you only know some of the characters in the password.
So after choosing the method and click Next, you will have to provide some clues about the password that you know: the length of the password, prefix/suffix, lowercase/uppercase letters, numbers, and symbols.
After all known clues have been provided, you will come to the Summary screen listing all the clues that you know. That will help PassRec narrow the range of password attack.
If you choose this attack method, PassRec will automatically try to find your password from its inbuilt password dictionary. This will take a longer time than a combination attack.
Brute Force Attack
Brute Force Attack method is for those who have no idea what the password of their PDF file contains, or how many characters it has. Under this method, PassRec will try every possible way to do the password recovery, which will take longer than the above two methods.
Step 3: Wait until it’s done.
Password recovery will take minutes, or even hours, totally depending on how many clues you have provided, and how complicated your password is.
If PassRec successfully unlocks your password, you will see this screen notifying you the password of your file.
You can click the Copy button, and use it to open the encrypted PDF file.