As of now it is forbidden to fly multicopters / drones commercially within Brazil. The ANAC is working to build a Brazilian legislation which will allow a legal certification process. The first rules maybe seen at the end of 2014. For now (ANAC & MD) rules include:
1 - Possible experimental flights if granted permission. (for non-commercial purposes)
2 - UAVs / Drones flown in distant places far from populated areas.
3 - Flights BVR (FPV only) is forbidden.
4 - The operation of model aircraft is forbidden near Airports and Military Installations.
Unconfirmed source taken from Riot Media)
None yet added.