From blog.sucuri.net
Vulnerabilities within WordPress can lead to compromise, and oftentimes known vulnerabilities are utilized to infect WordPress sites with more than one infection. It is common for out of date websites to be attacked by multiple threat actors or targeted by the same attacker using multiple different channels.
We recently came across a database injection that has two different pieces of malware accomplishing two unrelated goals. The first injection redirects users to a spammy sports website and the second injection boosts authority of a spammy casino website within search engines.