The two lumps: Directional antennas or maybe even somewhere for the wheels to go (although I somehow doubt it on a stealthyish aircraft)
500N: Your spoof theory is ok but why go to all the bother of parachutes, pallets and stuff, when you could just tow it and let it glide down?
If its is a real one, maybe all the hatches are on the bottom and they have been blown off by explosives which destroyed the clever stuff.
Oh, and the grille? Aircraft maybe referred to as she. Its in Iran now, so its not a grille, its wearing a burka
