What is URL: Phishing based on?

www.centerondisability.org

VirusTotal finds nothing:

https://www.virustotal.com/gui/url/53267370324ab059c91035340cb7698e602ed027d219cead013a7aacb42ae3b6/detection

I reported a false positive. I got a response from avast:

“Our virus specialists have been working on this problem and they informed me that this detection is correct.”

Based on what??

The report that I get from the console is that virtually every element on that website is malware. As usual, avast furnishes no details about its analysis, unlike many other anti-malware systems.

https://sitecheck.sucuri.net/results/www.centerondisability.org

On that website, Norton safe web see a phising link

-http://www.cissstore.com/adawarepersonal.exe

Link seems to be taken down >> https://downforeveryoneorjustme.com/cissstore.com

Thank you.