The man had driven to the taiga region on January 1 with his brother to celebrate the New Year when he was attacked by the predator.
The victim, who was so drunk at the moment of the attack that could not remember the place where he had met the animal, suffered lacerations on both arms and fractured ribs.
"We guess that the victim may have provoked the attack himself, as these predators normally don't attack humans without a reason," Vitaly Starostin said.
The man was later only able to roughly point out two areas in the forest where the attack may have taken place. The spots were some 20 km (12 miles) apart.
Officers tried for three days to catch the tiger, but their attempts were unsuccessful, and they eventually took the decision to shoot it.
"A tiger that has been wounded by a hunter becomes very dangerous for people. It will regard everyone as a natural enemy and may attack on sight," Starostin said.
A criminal case into illegal tiger hunting has been opened. An investigation is under way.
Siberian tigers, also known as Amur tigers, are the world's largest subspecies of tigers. They are on the World Conservation Union's critically endangered status list, with about 500 of them left in the wild.
On December 25, 2007, a Siberian tiger named Tatiana escaped its enclosure in the San Francisco zoo, killing one person and injuring two before being shot dead.
