Based on the scenario being described within the question it can be said that the type of attack that is being described is known as a wireless replay attack. Like mentioned in the question this is a network attack where an individual hijacks data in the middle of it being sent in order to copy it before the data reaches the intended recipient. This information can then be used for whatever the attacker intends.
A replay attack is a type of network attack in which an attacker detects a data transmission and fraudulently has it delayed. Replay attacks help the attackers to gain access to a network, gain information that could not have been easily accessible or complete a duplicate transaction so because of this fraudulent act, he or she gains access.
