The best known example of a fake Flash update was the Flashback Trojan Horse that attacked more than 600,000 Mac users a few years ago, but this is still a potential trap, which makes it one of the most lucrative scams on the internet.
Read more: http://www.pcadvisor.co.uk/opinion/security/3444810/how-avoid-best-malware-scams/#ixzz2S1kUp1AL