I did some digging and ...
The article doesn't mention which app was malicious however they did mention that the app publisher went by the name of "jackeey,wallpaper".
I ran some queries and it seems like the developer that publishes apps under "jackeey,wallpaper" also publishes under "jackeey.wu".
A list of the apps published by this developer are here (most of which are wallpaper apps):
http://andbot.com/developer/jackeeywallpaper