This Android malware avoids detection with a clever trick

Google Android figure standing on laptop keyboard with code in background

Cybersecurity researchers are observing a growing number of malicious Android apps that successfully avoid being detected by mobile antivirus software. The trick is in the APK (Android Package) compression method. 

By using an unknown or unsupported compression method, researchers (and ultimately, AV programs) cannot unzip the APK for analysis and thus cannot deem an app malicious.