One of the systems I have been running collects all our web malware detections for .ES domains. I usually check it out every morning, just in case I see something especially interesting or relevant. And when I find something, I like to create some statistics to have a global overview.
There are some things that I find every time I check my stats, like URLs that have been infected for more than 200 days, even being notified. That speaks of the lack of security awareness on some companies, and how some websites just get abandoned and become a hive of malware.
However one of the things that drew my attention was the detection of many PHP Backdoors with not-so-common extensions, such as JPG or MP3. Maybe a false positive? Worth taking a look!