Well yes, doing what you require is fairly easy. You can invoke a ssh command to the target raspberry from QML easily. I think the default "empty" SDK project even has enough functionality to build this, with adding just a SshConnection class

If you want to combine the functionality in raspberry, that requires some programming in the PI end. I am not sure about how those applications are done, but they might even be running in python or javascript, in which case the modification would be pretty easy
If the sources are not available, then it is more difficult as the application would be needed to be done from scratch.