MHTML, sometimes referred as MHT, stands for MIME HTML is a single file in which entire webpage is archived. When one saves a webpage as MHTML format, this file extension will contain HTML code, images, audio files, flash animation etc.
The MHT/MHTML file belongs to the category of
The following applications create and open MHT/MHTML files.
hex: 46 72 6F 6D 3A 20 3C
Not a valid MIME document
The error appears when MHT MHTML file format has problem in its structure or format.
Trouble opening MHT files
MHTML files are vulnerable to get infected. The issue occurs when the file is not scanned before opening it.