I am a ramp agent and was doing a walk around on flight kl1198 from svg to ams. the sun was just over the mountains on the way up and i was inspecting the stabilizers when i see some kind of a reflection in the sky.. i stare closely on it but the sun was in my eyes thought it was just an airplane.. but with closer look i noticed that it was not an airplane .. the reflection was to strong and it was not right possinoed where the air traffic is.. and it was no con trails behind it plus it was to low to be an airliner i'm shooting it was in about 5000 ft and was getting really clear because it was turning and was moving really slow.. i reached my phone to try to take video but then it was gone.. but with better look i saw it again so far away and faiting away. i took a look on the flight radar and no airplanes where flying over this area plus when i saw it fait away it was going 30 to 45 degrees up and definitely not down.. the shape was like 2 cubes attached together but corner to corner.