Password protected PDF in app called Schooltas


macrumors newbie
Original poster
Jul 21, 2015
Hi guys,

I have extracted books from the app called Schooltas (I have paid for the books!), but the books(pdf) seem to be password protected. It probably is a standard password for all PDF's, because the free books are also password protected. How to find this password? The books show perfectly in-app but when I try to open it on my desktop I have to enter a password.

This is the link to the app:

I would really appreciate all help I could get!