[closed] is it a malware?

i have a wireshark result. there is a connection between A and a server. During this connection server repeatedly sends ACK=202 and correct seq of the data, A is sending seq =202 with correct ACK and len=0. At the end A has received many data but server has only packet with seq=202 which its length is 0.

TCP disconnection, instead of sending FIN to Server, A sends RST to Server. I want to know that is it a malware? if it is a malware what is its target or it is what kind of malware?

thanks for your consideration