I have already posted this on the bastage forum but I rather do it here too to make sure a maximum people read it.
I received a friend invite from a random person who later on sent me an email prompting to participate in a "spin the wheel" game where you are supposed to win a game. You are required to "link" your steam account, so you are directed to a steam login page that is a fake page. I repeat, it is not a steam login page, it is a phishing page meant to steal your steam account information.
If you have received a similar message or have entered your steam credentials recently in a website you were provided through similar ways, CHANGE YOUR STEAM PASSWORD NOW! And any other accounts you have that use the same password.
This is the message I was sent: