Horror Movie from late 70's early 80's - monster in a forest
Hi, I've seen this movie when I was very little and only remember bits of it.. I do remember that there were 4 young people, 2 guys and 2 girls who ended up in a forest and found a cabin (or old house)... in that house there was something like a monster who started killing them by throwing some sort of leeches on their faces (I know it sounds silly and hilarious! ).. anyway, only one girl survives and she blows up that house with dynamite!. again I know it sounds silly :)
If anyone can help me figure out the name of this movie, that would be great!!
Thanks a lot!