No. It is the flag of the Ukrainian Insurgent Army. They were similar to the country of Finland at the time, trying to make their own Ukrainian state against the Soviets (Different than the Finns who already had a state, but wanted territory back from the winter wars) Originally fighting against the Nazis with guerilla tactics,They later cooperated with the Nazis, as they had a common goal - to defeat the Russians. I’m not sure what their plan was afterwards, seeing as the Germans wished to annex that land for “living space” rather than leave it to the supposedly inferior Slavs.