Why soft land it? Just transfer the ISS into a lunar orbit via a low-consumption gravitational assist. It could take a long time, though. Probably years even if it survived the trip.
Maybe an uncrewed Dream Chaser with an empty Shooting Star cargo module could be launched, returning to Earth with a test crew, certainly a truly precious cargo.
Why soft land it? Just transfer the ISS into a lunar orbit via a low-consumption gravitational assist. It could take a long time, though. Probably years.