It turns out to be the personal aircraft of the president of Turkmenistan. A bit of an illusive aircraft because not many details are known. However a fellow PP pointed me in the direction of an interesting article:
A rare image of the actual airplane can be found here.
The aircraft apparently landed at KADM this same day after a stop over at probably KPQI. The reason for the aircraft being at the destination is probably for maintenance or upgrades / alterations to systems or the interior.