This issue with mounting and displaying "Malformed URL" is still a
problem with Kubuntu 18.04.4 LTS Bionic Beaver with all updates applied
as of today (Feb 17, 2020).
There is a confusing history of bug reports and patches for this issue,
as follows:
USB Drives Give Malformed URL From Device
The problem still exists on Kubuntu 16.04.
With a fresh install of Kubuntu 16.04, I proceeded to install wine with:
sudo apt-get install wine
After this completed, I noticed in the Application Menu that all of the
wine apps were listed under "Lost & Found" instead of "Wine" as they
should