Country of origin Daybill poster. Artwork by Brian Clinton. Razorback is a 1984 Australian horror film written by Everett De Roche, based on Peter Brennan's novel, and directed by Russell Mulcahy. Starring Gregory Harrison, Arkie Whiteley, Bill Kerr, Chris Haywood, David Argue, Judy Morris and John Howard. The film revolves around the attacks of a gigantic wild boar terrorizing the Australian outback, killing and devouring people. The film enjoys a huge cult following .