MyDoom.BF appeared on February 20th, 2005. It is a minor variant of MyDoom.BB. MyDoom.BF uses a different site from which the worm attempts to download the additional Backdoor (Backdoor.Win32.Surila.o). This variant is not packed with executable compressor. For more details, please see Mydoom.BB
Allow F-Secure Anti-Virus to disinfect the relevant files.
For more general information on disinfection, please see Removal Instructions.