License. 7-Zip is free software with open source. The most of the code is under the GNU LGPL license.
: Upon extraction, the archive is said to contain a series of highly distorted images of a young girl ("Mary") and a single, low-bitrate audio file. petitmary.7z
: A user finds a link to a file named petitmary.7z on an obscure forum (often cited as 2chan or early 4chan). License
: It is widely believed to be an imitation of the "Smile Dog" or "Mariana's Web" style of creepypasta, designed to create a sense of digital dread. petitmary.7z