EICAR ANTI-VIRUS TEST APPLICATION
THIS APP IS NOT HARMFUL. IT WILL NOT HARM YOUR DEVICE IN ANY WAY.
This app simply displays a message similar to this one and nothing more. It requires no permissions on installation. It does not read your data, access the internet, or create any files. It does not run in the background, start automatically, or do anything at all other than display a message.
It does, however, contain some text, created by the European Institute for Computer Antivirus Research (EICAR), which is designed to be safely detected by all anti-virus products as a virus, so that people can test their anti-virus applications to see if they're working correctly, without having to actually infect their devices with a real virus or other malware.
To make it absolutely clear - this app is completely harmless, but should be detected as a virus. This is its entire purpose.
If you run an anti-virus app on your phone, it should detect this app as a virus when you install it. If it doesn't, then perhaps your anti-virus software isn't as good as it claims. Or the people who made it haven't had time to update their application yet. The current version (v7) of this industry standard test for anti-virus products has been around since September 2006, so there's really no excuses.
For further details please search for "EICAR test file" on Wikipedia or visit EICAR's website itself at eicar.org.
This app should ideally be detected by all anti-virus software as a virus, including anti-virus software running on your PC. If the app vanishes after connecting your phone to your PC, it's likely that your anti-virus software has removed it or quarantined it.