Anyone familiar with a press87.php file – is this a hack?

I just noticed a strange file on the Joomla install on my server named "press87.php" that isn't associated with anything in particular. It seems to be encrypted and, doing a search on the interweb, it seems to show up in a number of directories – including WP installs – but in seemingly random places. Is this a hack? Does anyone know anything about this?

The original code contained in the file can be viewed at http://ift.tt/1U1nJvP

Cheers!