I'm positive it's not from Carmina Burana
(unless, as J'torian says, there are other movements that are rarely performed... this I doubt), but it's clearly an imitation. It's not so difficult to imitate this type of music, and many film scores have replicated this sound world.
Have no idea what it is. But if you like the sound, go pick up a CD of Carmina Burana
, by Carl Orff!