[HELP] PKM file still unable to open after going through QuickBMS

[siapss]

Hi,

I'm trying to extract some textures from an android game.
The game files have a header of "Antm", in which there is a readily available script.

After running the files through the script, all the standard file formats (JPEG, PNG) can be opened normally, however I can't seem to open any of the PKM files. I tried seeing the header of the extracted PKM files, and they now have a header of "lmF@".

So, for these PKM files, I tried using Mali Texture Compression Tool but it says that the PKM file could not load.

Can anyone point me in the right direction? I've attached some of the before and after files from the game.

Thanks!