My "Avast: Mobile" security is giving me massive warnings about Trojans such as: "Android:SMSSend-DC[trj]"
Lots of users reporting about these Trojan warnings.  

It may be Avast Virus Defenition Update issue.

Post From Avast Moderator
 

Update the VPS to 14010901
  

Source Forum  


From Google+ found this image. I think its a similar issue.