Well the alert avast is giving on the home page, image1 (and presumably the others too) is HTML:Applet-inf and this -inf at the end usually signifies that some code has been injected (in this case presumably an applet) that is or may also be pointing to a malicious site.
A check of the source code on the page shows an applet that points to an IP address rather than a user friendly domain name (image2). Checking of that IP and trying to connect to it causes the network shield to alert (image3) URL:MAL, indicating that this IP address is on avast’s malicious sites lists. So this falls in line with what my explanation of what the -inf at the end of the malware name usually signifies.
So it isn’t so much the seasideaquarium.com site, but the applet which goes to an external site which is considered malicious.
Now I don’t know if A) that applet is legit and B) the IP address being considered malicious is correct (see ~~~ below), but that appears to be why the alerts are happening.
It is possible that many domains are hosted on this IP address, if so one or more could be infected leading to an IP block. This certainly needs further investigation.
Avast alert with URL:Mal for e.g.: hxtp://207.224.31.229/-wvdoc-01-/Glimpse Java Viewer Applet
A PHP Array-push is being performed from /68.185.19.92 for example, http://68.185.0.0/19%20%20 urlopen error timed
see: htsp://jsunpack.jeek.org/?report=e71e575e9b002155bad807bbcfcd86f34e0a91ce *
This link is given only for our security researchers,
use full script blocking and open up in a sandboxed environment for protection.
Warning! Do not venture out there if you are not enough security savvy!
Besides 68.185.0.0/19 AS20115 (not registered) Shared info is fetched in the background
See: http://urlquery.net/report.php?id=125425
Suricata /w Emerging Threats IDS alerts
2012-08-12 03:59:24 207.224.31.229 urlQuery Client 3 FILEMAGIC Zip archive data
2012-08-12 03:59:21 207.224.31.229 urlQuery Client 3 FILEMAGIC Zip archive data
2012-08-12 03:59:18 207.224.31.229 urlQuery Client 3 FILEMAGIC Zip archive data
2012-08-12 03:59:17 207.202.157.37 urlQuery Client 3 FILEMAGIC Zip archive data
2012-08-12 03:59:17 68.185.19.92 urlQuery Client 3 FILEMAGIC Zip archive data