Researchers @jeromesegura and @ Xylit0l have come across Russian pages promoting fake installers from well-known antivirus programs such as Nod32, BitDefender, Panda, AVG, Avast, Avira, Trend Micro, among others.
Once the installation starts it can only be completed if the victim sends an SMS, this would supposedly be necessary to activate the program:
SMS needed to finish the installation
SMS to activate the program
More information and screenshots in XyliBox (in English).
These SMS scams have been around for a long time, even in Spanish you can find some similar examples how a million uses. comThis site offers all kinds of free programs, but to download them you need to send a text message!
You have to send an SMS to download Avast Free
In addition they also create custom pages to promote the programs and thus obtain more subscriptions:
Promotion, Ares free by SMS
All of these programs can be downloaded free and secure from their respective official pages, without having to lose money with SMS subscriptions.
See also: Avast! Free as bait to get SMS subscriptions. Fake Messenger requests activation code by SMS. About Softonic downloads and extra software.