Dud missile
What would you do if you found a missile in the middle of the forest? If you answered “run away,” we’re right with you. However, the OP had lingering questions that a seemingly inactive warhead couldn’t answer. So, they took their inquiries to Reddit, which only confirmed what we would’ve been too afraid to figure out.
This missile used to stand in front of a military school, so this would indicate that it isn’t and never was a live warhead. For some reason, the missile ended up in the middle of the woods. Now, the OP and his brother could kick the missile without worrying about it blowing up.