Complete Guide of Passper for PDF

Part 1: How to Recover Document Open Password

Part 2: How to Remove Permissions Password

Note

Based on the varying levels of your familiarity with the password, we recommend different attack methods for your consideration. The details are as follows:
① I have partial information about the password.
- We recommend using a combination attack or mask attack.
② I know it's a common password, but I don't know the specific details.
- We recommend using a dictionary attack.
③ I have no information about this password.
- We recommend using a brute-force attack.

In addition，here is a detailed description of the 4 modes of attack. If you are still not sure which mode to choose after reading it, you can send us an e-mail to passper.support@imyfone.com.

It is a widely used method to unlock passwords for many types of files. It uses a dictionary which contains millions of the most commonly used passwords. Thus the chance of recovery is high. By using this mode you can take advantage of the built-in dictionary or import your own from the settings menu.

Find your password by customizing the character settings and randomly combining the characters you choose.

For example, you usually use your name (Tom) and some numbers to create a password of 6-8 characters. You can customize the settings as follows:

Password Length: 6-8 characters
Uppercase Letters: T
Lowercase Letters: o,m
Numbers: Select All

The program will combine only the characters you choose and try all the combinations of these characters. The fewer characters you choose, the faster it will find your password.

If you have a little clue about the password, you are highly recommended to use this attack. It will consider the characters, prefixes, suffixes, and length of the password and try to recover the password. This method will be better if you know certain character types not included in the password.

For example, you are sure that your password won't have symbols. You think that your password may contain your name (Mary) and you usually set a password of 6-8 characters. You can customize the settings as follows:

Password Length: 6-8 characters
Characters not included: symbols
Characters or combinations of characters may be included: Mary

The program will combine all the other characters (uppercase letters, lowercase letters, numbers except symbols) with "Mary" to find your password. If your name "Mary" doesn't appear in the password in its entirety, write the letters separately.

If you have no clue about what the password of your Excel file could be, this is the method you should choose. Bear in mind that this method will take a little longer to find out the password for your file.