Call windows scam

Hello, so one of my co-workers came across the classic ‘‘malicious pornographic spyware/riskware detected, call windows immediately’’ message while on internet explorer(I know, right?). It’s bad I can’t add a screenshot of the error message, but it contains so many grammar errors and bad phrasing, it would’ve been fun to read it. Anyway, the popup link is http://aoufcro.xyz/code8213s/2dbasfjddd333hfjd and the tollfree number is +1-888-442-8213

It looks like the website has already been taken down but why is this in the phishing catogory when it’s a Microsoft pop-up scam?