Android phones and software come in a variety of incarnations, mostly because even as software has been updated over the years many have decided to stay with what they have and have forgone updating. This continued fragmentation has led the United States government to conclude that Android phones could pose a risk to security for government employees because Android phones are more prone to malware. In a startling result, over 79% of the malware covered in the government study were on Android devices. Apple’s iOS, however, came in at a paltry 0.7%.
Another thing that makes Android a target is that it is the most widely used smartphone software in use on the planet. Such large scale numbers make it very attractive t malware producers. Half of the malware attacks came from text messages that installed malicious apps. This is similar to getting a suspicious email with a link to a virus.
Source: The Verge