extract command can be used to extract images and font files from a PDF file. The image and font files will be saved out to the same folder which the file originates from.
mutool extract [options] input.pdf [object numbers]
Command line parameters within square brackets
 are optional.
Options are as follows:
Use the specified password if the file is encrypted.
Convert images to RGB when extracting them.
Embed SMasks as alpha channel.
Do not use ICC color conversions.
Input file name. Must be a PDF file.
An array of object ids to extract from. If no object numbers are given on the command line, all images and fonts will be extracted from the file.
This software is provided AS-IS with no warranty, either express or implied. This software is distributed under license and may not be copied, modified or distributed except as expressly authorized under the terms of that license. Refer to licensing information at artifex.com or contact Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco, CA 94129, USA, for further information.