Severance

Severance is a 2006 comedy horror film co-written and directed by Christopher Smith. Co-written with James Moran, it stars Danny Dyer and Laura Harris. The film tells the story of a group of British and Canadian co-workers who go to a remote mountain forest in Hungary, where they become victims of murderous attacks by a group of poachers.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.