WebM Fake MP3 Files
The WebM format is an audio format controlled by Google (not a good sign). The WebM file format was initially developed as an open source media format by On2, Xiph and Matroska released initially in 2010. Google later sponsored the development of the WebM project, while adding support to the Google Chrome browser.
Traditional MP3 Files are NOT WebM format. Example traditional mp3 file data:
Audio file with ID3 version 2.4.0, contains: MPEG ADTS, layer III, v1, 320 kbps, 44.1 kHz, Stereo
Recently files with an .mp3 extension have been appearing that can not be played with traditional mp3 software. Even VLC is refusing to play these .mp3 files.
Simple investigation using the 'file' command reveals that these FAKE MP3 Files are WebM format. These are not Standard MP3 Files and SHOULD NOT HAVE the MP3 extension.
The source of these fake MP3 file is mostly coming from Android Apps claiming to perform the function of downloading mp3 music files for you.