this looks like the plain 3.5 L version of the challenger, the chrome fuel cap only comes standard on the RT and SRT-8, The 3.5 only has one exhaust muffler and no rear bumper lower valance. The SRT and RT also have the front lip spoiler.
This car is the basic version, chooha engine challenger most probably sold as salvage in USA, exported to DXB and rebuilt at "ustaad denter" then re-exported to Pakistan. It might also be an auctioned off vehicle, they are not very expensive to buy in the used market.