Question Find password stored in Binary

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kuruvi

Newbie
Dec 15, 2016
4
32
0
Note: feel free to PM for app name, etc

(I have attached the binary of the app and encrypted pdf) I am using an app that downloads the encrypted (password protected) pdf files and it decrypts to view them. As I need to view these encrypted pdf files on my default pdf viewer, I need to decrypt them with password.

I did Disassembling with IDX pro but I can't find the password (I am a noob). I do see the entries like "PDFdocumentunlockwithpassword" but I can't get more info on it, I am enclosing the screenshots of what I see from IDX pro.

It will be great if you assist me to (or) retrieve the password, thanks





 
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r4z0r

Coder
Meme Tier VIP
Jul 21, 2016
246
1,678
13
It's way more complicated than finding where's the password because I'm 90% sure that the password is encrypted either so you'd need to reverse everything, see how it encrypts and etc... This is NOT something basic nor easy, it would take days, weeks, or even months of dedication to achieve something. We're not in 2004 where ppl could easily reverse these stuff, if this is an online application the password may be encrypted server side so you must consider everything, I'm not sayin it's impossible but if this is a famous app is rly unlikely you'll manage to break its encryption.
 

kuruvi

Newbie
Dec 15, 2016
4
32
0
if this is an online application the password may be encrypted server side so you must consider everything
it is an local app (iOS), password was found in the earlier version of the app and unfortunately it got changed now and I lost the contact with the person who did this.
 

kuruvi

Newbie
Dec 15, 2016
4
32
0
Virus scans, 2 for each attachment
really, there is nothing other than the binary and a pdf file (inside the zip)!! I just downloaded myself and unzipped. Also, I'm using mac, so there should be no Virus, please tell me how do you scan?
 
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