In this article “On Monday, we released our Mobile Threat Report for Q1, and in that report we mention there’s a growing number of mobile trojans that “deliver on their promises”. What do we mean by that?
Well, in the past, mobile malware often offered something such as “free” mobile web services as bait, but then, during installation, the trojan would display some kind of decoy error message.
At that point the folks installing the trojan would typically search for answers, either because they were suspicious or because they were troubleshooting. That would then lead to actual answers on forums that what they had in fact installed was a trojan. These days, when even non-nerds have smartphones, the bait is quite a bit different.”