Hey, when I try to implement the 'angencryption' project with pdf, everything goes smooth except that the payload apk couldn't be installed, the error being there was a problem parsing the package.

I have implemented the same version of the wrapping apk as for the png and jpg formats. It works well with PNG and JPG. Should I assume that the error is indeed in this part i.e. in interpreting and decrypting the pdf?

Secondly, Can this PDF/APK format polyglot work on latest Android versions, may be at least Lollipop.
Kindly help.
I shall be obliged.
Regards