Help with downloading AES 256 encrypted PDFs

[Sagnik]

Hello everyone, can anyone help me to find the key of AES-256 encoded pdf ? Url to the site :- https://www.trainwithshubham.com/s/preview/courses/Batch-5---DevOps---Zero-to-Hero--65...b0b4fbdf368b0e
I have found some threads talking about key finding of the AES protected pdf, but no complete tutorial.
Previously I have gone through the site and able to make a new python script according to the new js to download AES 128 encrypted videos, but I am struggling with pdf. So I decided to open a new thread. Can anyone help please?

[slayer36]

Hello everyone, can anyone help me to find the key of AES-256 encoded pdf ? Url to the site :- https://www.trainwithshubham.com/s/preview/courses/Batch-5---DevOps---Zero-to-Hero--65...b0b4fbdf368b0e
I have found some threads talking about key finding of the AES protected pdf, but no complete tutorial.
Previously I have gone through the site and able to make a new python script according to the new js to download AES 128 encrypted videos, but I am struggling with pdf. So I decided to open a new thread. Can anyone help please?

https://www.transfernow.net/dl/202505207Ss6kB6K

pass:

82ec6a42-5d39-42b7-bc5e-e9074fe0b5de

[Sagnik]

https://www.transfernow.net/dl/202505207Ss6kB6K

pass:

82ec6a42-5d39-42b7-bc5e-e9074fe0b5de

Thanks. Can you tell me what you have used ? I have found a console code to get this after posting the thread. Are you using the console or any python script. ?

[slayer36]

https://www.transfernow.net/dl/202505207Ss6kB6K

pass:

82ec6a42-5d39-42b7-bc5e-e9074fe0b5de

Thanks. Can you tell me what you have used ? I have found a console code to get this after posting the thread. Are you using the console or any python script. ?

better keep hidden if using console

[Sagnik]

better keep hidden if using console

Ok. BTW thanks for your help

[larley]

Source: https://discord.com/channels/1313636594112139345/1360702457206018232/1361283346428067993

from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad
import base64

def decrypt_p_value(p: str) -> str:
    try:
        # Extract IV, Key, and Ciphertext
        iv_hex = p[:32]
        key_hex = p[-32:]
        ciphertext_b64 = p[32:-32]

        iv = bytes.fromhex(iv_hex)
        key = bytes.fromhex(key_hex)
        ciphertext = base64.b64decode(ciphertext_b64)

        # Decrypt
        cipher = AES.new(key, AES.MODE_CBC, iv)
        plaintext_padded = cipher.decrypt(ciphertext)
        plaintext = unpad(plaintext_padded, AES.block_size)

        return plaintext.decode('utf-8')

    except Exception as e:
        return f"Error during decryption: {e}"


if __name__ == "__main__":
    p_value = input("Enter the p value: ").strip()
    result = decrypt_p_value(p_value)
    print("Decrypted value of p:", result)

[Sagnik]

Source: https://discord.com/channels/1313636594112139345/1360702457206018232/1361283346428067993

from Crypto.Cipher import AES
from Crypto.Util.Padding import unpad
import base64

def decrypt_p_value(p: str) -> str:
    try:
        # Extract IV, Key, and Ciphertext
        iv_hex = p[:32]
        key_hex = p[-32:]
        ciphertext_b64 = p[32:-32]

        iv = bytes.fromhex(iv_hex)
        key = bytes.fromhex(key_hex)
        ciphertext = base64.b64decode(ciphertext_b64)

        # Decrypt
        cipher = AES.new(key, AES.MODE_CBC, iv)
        plaintext_padded = cipher.decrypt(ciphertext)
        plaintext = unpad(plaintext_padded, AES.block_size)

        return plaintext.decode('utf-8')

    except Exception as e:
        return f"Error during decryption: {e}"


if __name__ == "__main__":
    p_value = input("Enter the p value: ").strip()
    result = decrypt_p_value(p_value)
    print("Decrypted value of p:", result)

Oo thanks for the python script. Can you give the invite link to the discord seever ?

[larley]

discord.cdrm-project.com

[Sagnik]

discord.cdrm-project.com

Thanks