: 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.

While the story is a popular piece of internet folklore, here is the reality of the file:

: .7z is a legitimate compressed archive format used by the 7-Zip software .

: A user finds a link to a file named petitmary.7z on an obscure forum (often cited as 2chan or early 4chan).

: Legend says that viewing the images in a specific order or playing the audio until the end triggers a series of system errors. Some versions of the story claim the girl's face begins to appear in the background of other photos on the user's hard drive, or that the computer eventually becomes unusable as the "Petitmary" files multiply and fill the disk. 🛠️ Fact vs. Fiction

License. 7-Zip is free software with open source. The most of the code is under the GNU LGPL license.