A shaken up McCarthy, who also works as a bartender, told TMZ that the scandal has already cost him work, and he's considering taking legal action against the reality star.
The DJ's photo apparently shows up in a Google search if someone types in "random guy," according to Gawker.
This latest revelation comes after news broke on Wednesday that Duggar apparently had two different accounts on Ashley Madison, a site aimed at clients seeking extramarital affairs.
The 27-year-old Arkansas native reportedly paid nearly $1,000 for both monthly subscriptions. The email used for the accounts was discovered to be connected to an OKCupid profile, which is how the misused photos of McCarthy came to light. That email address was also supposedly linked to a faux Facebook account for a "Joe Smithson," according to the U.K.'s Daily Mail.
After the Ashley Madison scandal came to light, Duggar released a statement Thursday, revealing that he cheated on his wife, Anna, and has become addicted to pornography, though the latter portion was later removed.
"I have been the biggest hypocrite ever," he wrote. "While espousing faith and family values, I have secretly over the last several years been viewing pornography on the internet and this became a secret addiction and I became unfaithful to my wife."
"I am so ashamed of the double life that I have been living and am grieved for the hurt, pain and disgrace my sin has caused my wife and family, and most of all Jesus and all those who profess faith in Him," he added.