Risk of Cracked and Non Market Apps.
I am mostly a security debugger and so a friend of mine asked me to debug one of his apps, while I was working on it, I was looking into another non market app's pirated source code, here are the few things I noticed.
The app gathers your phone book data. [Google Play Version does't have this permission]
The app gathers your message data. [Google Play Version does't have this permission]
It calls a backup function and also a write block function, this could be used to send malicious/spam sms from your device without your notice.
Kinda Busy analyzing non market apps, will update a case study the risks involved! Cheers!