The remote host is running an Avira AntiVir product. The scan engine of the installed product is earlier than 184.108.40.206 / 220.127.116.11. Such versions reportedly fail to properly inspect specially crafted RAR/CAB/ZIP/LH files. An attacker could embed code in such files in order to circumvent detection by anti-virus software.
Use the Avira update feature to upgrade the scan engine to 18.104.22.168
/ 22.214.171.124 or later.