I see it
25de6c79c5ca567406ece8e6a0bd199142563bdd480002dcThere's the string "c5ca567406ece8e6a0bd199142563 bdd480002dc" hidden in the image.
wtf. did you just load the image in notepad or something?
If you use the 0-tolerance magic wand from paint.net on the black area:Crop and enhance and you get:
oh wait you just addded the file name to the begining
IT'S ONLY 39 CARACTERS LONG, SHA1 IS 40.
DECODE IT FOR GODS SAKE