An possibility is to create a share on the windows-host where the jar file is located. Mount the share from the linux host and create a simple copy script which will be executed by the cron daemon on the linux host.
Mount Windows share from linux
mount -t cifs -o username=xxx -o password=xxx -o workgroup=xxx \\hostname\sharename mountpoint
(workgroup can be replaced with domain=xxx if nescesary)
Hope this helps.