Note that this might be a STEREO mic, so the head may have two mic elements inside, with some degree of separation. There's no safe way to fix the plug, so you'll have to start by cutting that off, but I'd expect to see more wires inside than you'd expect. There may be two unscreened wires inside an overall screen/sheath (one for each mic plus the screen for ground), or there may be two separately screened wires (one for each mic, with the two grounds connected inside the plug). As someone else said, prob a fairly low quality mic intended to be plugged directly into the (stereo) mic socket on a PC.
Geoff