Assuming that you have a software firewall installed, and it's set up to stop outbound traffic that you haven't approved, then it's
unlikely to be a malicious application performing outbound scans.
A 'FIN' packet is sent by your machine to close its TCP connection with a site (in the case of the log you've posted above, and assuming that your tracert was correct, deviantart.com). Given that all of the packets being sent appear to be targeted at port 80 on the destination server I would guess that you PC is just closing off the HTTP connections that it's made as part of your standard browsing.
Basically, if you're 100% sure that you've a) got a clean build, b) got a software/hardware firewall that filters
outbound traffic, and c) the sites listed as the destination IP addresses are sites that you've visited legitimately, then I wouldn't worry
Don't take this the wrong way, I don't know what your level of technical knowledge is, but if that's a bit too technical please let me know and I'll try to be a bit clearer.