Not to confirm outright it's a genuine photograph, but I see nothing wrong with it.
The dark shadows have the same degree of greyness. Both aircraft have the same amount of blurriness overall and at the edges (due to their far distance). The lag of light reflections from the bottom of the GJ-11 (totally dark bottom) could be due to its pitch angle to sunlight.
The picture could still be photoshopped but the faker would have to make the extra efforts to make sure the above features are seemingly in line. Most fakers do not have the patience to bother with the details.