Mobile malware is fast becoming essential to address from an enterprise security standpoint. Few people would even have a clue where to start analyzing a program on a smart phone. Free software is available that can deliver the original Java source for any given Android app. The vast majority of malicious apps come not from the Google market but from third-party package distribution sources. We’re not saying that you shouldn’t ever pull an app from outside the market, just that you should do your homework before you do.”]
Source: https://blog.talosintelligence.com/2011/11/android-malware-analysis-how-to.html