Malayalam Calendar 2005 followed in Kerala is provided by the Deepika Newspaper. The 2005 year Malayalam calendar contains important festivals in Kerala and uses Malayalam language to mention Nakshatram and festival details. This Kerala calendar of 2005 of Deepika is not in pdf format but in jpeg format. But you can save the webpage or image format and use it.
You can try this to use themain calendar link. (in this select the 2005 calendar for viewing)