Comment 6 for bug 378833

freshclam downloads and writes files in /var/lib/clamav, and writes in /var/log/clamav/freshclam.log, uses config files from /etc/clamav, and writes pid file in /var/run/clamav, but (AFAIK) it doesn't mount anything (at least not the init.d script itself).

You could try adding a "set -x" after the first line in the init script, and run it like that, to see where exactly it hangs. This will produce a lot of output, it will show you every command which gets run run from the script, maybe it will give you/us a clue where it happens.