Snowden, the former intelligence analyst who revealed the extend of US global eavesdropping, was one of the joint winners of the "alternative Nobel peace prize" last month. A hero to some and a traitor to others, he would be a highly controversial choice for the 878,000-euro (USD 1.11-million) award.
The Pakistani girls' education campaigner Malala Yousafzai - who was also a favourite last year - is also said to be in the running along with Pope Francis and a Japanese pacifist group.
But from his exile in Russia, the US fugitive said during a recent press conference that "it is somewhat unlikely that the Nobel committee would back..." him winning the real Nobel.
However, other Russian-based individuals or groups could be a popular choice for the Nobel Committee.
Also Read
For the Nobel committee president Thorbjoern Jagland, "sanctioning Moscow would... Be a way to prove that he acts independently, since (Jagland) is (also) the Secretary General of the Council of Europe, which counts Russia as a member," Jacob told AFP.
Nobeliana.Com, a website run by leading Norwegian Nobel historians ranked Malala - who was shot in the head by the Taliban in 2012 - as their top candidate ahead of Snowden, for her fight for girls' right to an education around the world.
"She is still very young (17 years), and she has said that she does not deserve the Peace Prize yet. As a Nobel laureate she will be an even greater target for extremist groups," they wrote.