I don't have an answer for what happened but it looks like those files are foobarred beyond belief. Or your filesystem itself has been corrupted.
Easy solution: Delete or un-install the package those files came from and re-install that program. Then check to see if permissions and sizes are sane.
If not --
Pain in the A** solution:
N.B. I can't tell you if this will help or not but it can't hurt and I don't have any other ideas.
Is /usr or /usr/sbin on a separate partition? You could umount
that partition, fsck
it and see what happens.
If not a separate partition, you could force an fsck by placing a file named forcefsck in the /etc directory and reboot.
You do not
want to run fsck on mounted file systems.
If that works, remove the /etc/forcefsck file.
Hopefully, all you need is a fresh install of that particular package. You might considered downloading the latest version from your distro in case say your CD install disc has a corrupted package.
Hacked? I doubt it.