Asking this is totally fair, but I need to mention that finding a truly free download of 'A Clash of Kings' outside a library or trial offer usually means piracy. The production on these big series is expensive, and the narrators like Roy Dotrice (RIP) deserve to be paid for their incredible work. I used to hunt for those sketchy sites too, but then I realized my local library app, Libby, had it the whole time with just a card.
My advice is to check if your library partners with Hoopla or OverDrive. You 'borrow' the audiobook for a few weeks, it's 100% legal, and it disappears after the loan so you don't have to manage files. If your library waitlist is long, Audible's free trial gives you a credit to get any title, including that one, to keep. That's how I got my copy.
Honestly, the peace of mind knowing the file is safe and high-quality is worth more than the risk of malware from a random forum link.