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
Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.