SelF EXtracting file is an archive with an executable routine added. Detected as an executable on Windows: PE32 executable (GUI) Intel 80386, for MS Windows, RAR self-extracting archive for example for a RAR archive.
The classifier does not produce kind = archive
Could you please add the association for SFX archive to the list of supported archive file signature ? This way, karton-archive-extractor could extract child file.