Got a friend request from someone I played with and not sure if this is real

So I added him, he messaged me a steam group and a link to a site and he said I won a knife, I click the link and it just shows 3x3 thing and to click 3 of them, and it says I got a knife, and two gun skins, the website is prizewave.fun, is this legit or nah, I suspect it is a scam, but just making sure it's not, and hopefully people see this, so if they get it aswell they know