ETA #2: I reported this to AO3 Technical Support because I thought they should know. They eventually replied back to me that THIS IS a legitimate AO3 site that points to the actual AO3; it exists for those in whose countries the actual ao3.org domain is blocked. It won't steal your AO3 credentials because it is AO3. Whew! I am so happy to be wrong about everything below!
Just saw this warning about a fake AO3 phishing site coming up in searches - the original PSA about this was posted on Tumblr (reblogged from Tumblr OP
doubly_magic by
mekare):


The domain is "https://Iđź–¤ao3.ws" and they even use the AO3 logo.
DO NOT CLICK ON THIS SITE. DO NOT BE FOOLED.
As the original post says, that fake site exists solely to steal your AO3 login credentials.
In some browsers, as in the Duckduckgo browser the OP shows in the original post, phishing links can be blocked by right-clicking (RIGHT click! don't just click on it!) on the site itself and selecting "Block this site from results". You can also choose to report it (which I did).
I'm going to report this to AO3, too. I know they can't stop another site from existing - but they can warn AO3 users (and maybe take legal action? IDK).
( click here if you're paranoid like me and find the timing suspicious )
Please signal boost this, if you can!
ETA: So far, it's only coming up as a result in Duckduckgo searches, not Google and not Brave browser's own search. Those may have more anti-phishing code built in to their search engines. But just... be careful.