1. /
  2. Security Response/
  3. SymbOS.Blankfont.A


Risk Level 1: Very Low

August 10, 2005
February 13, 2007 12:43:13 PM
Also Known As:
Blankfont.A [F-Secure]
Trojan Horse
Systems Affected:

SymbOS.Blankfont.A is a Trojan horse that drops a corrupt GDR font file onto the compromised device. The Trojan runs on the Symbian OS, which is the operating system for Nokia Series 60 cellular telephones.

It is reported that the trojan arrives as the file Rally_2.sis

Antivirus Protection Dates

  • Initial Rapid Release version August 10, 2005
  • Latest Rapid Release version August 20, 2008 revision 017
  • Initial Daily Certified version August 10, 2005
  • Latest Daily Certified version August 20, 2008 revision 016
  • Initial Weekly Certified release date August 10, 2005
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Threat Assessment


  • Wild Level: Low
  • Number of Infections: 0 - 49
  • Number of Sites: 0 - 2
  • Geographical Distribution: Low
  • Threat Containment: Easy
  • Removal: Easy


  • Damage Level: Low


  • Distribution Level: Low
Note: On May 14, 2015, modifications will be made to the threat write-ups to streamline the content. The Threat Assessment section will no longer be published as this section is no longer relevant to today's threat landscape. The Risk Level will continue to be the main threat risk assessment indicator.
Writeup By: Kaoru Hayashi

Search Threats

Search by name
Example: W32.Beagle.AG@mm
STAR Antimalware Protection Technologies
Internet Security Threat Report