Avanan's research into an exploit flaw in the Google Docs' comments feature was highlighted in Bleeping Computer. The exploit allows hackers to easily send malicious links via the comment feature. As Bleeping Computer writes:

Since Google itself is being "tricked" into sending out these emails, the chances of email security tools tagging them as potentially risky are practically zero.

This recent campaign is blowing up in proportions and is being monitored actively by threat analysts at Avanan, who shared their report with Bleeping Computer prior to publication.

Read the rest of the article at Bleeping Computer