Security experts say a late October phishing attack may have helped set up the CheckFree attack. Domain-name phishing attacks can be very effective because if one victim hands over login credentials to a popular domain, thousands of Web surfers can be attacked. CheckFree customers trying to connect with the company’s Web site were attacked with code that exploited a bug in Adobe’s Reader software. The company has taken security measures since the attack, but she did not want to describe them for fear of helping other criminals.”]
Source: https://www.csoonline.com/article/2123502/network-solutions-phished-for-checkfree-web-attack.html