Unknown object caught over Port St. Lucie, Florida

On June 22, 2016, in the early morning, a witness living in Port St. Lucie (in the state of Florida, USA) has photographed a weird black UFO without knowing it.

Witness statement:

I was home. I took three pictures on the moon at approx 7am. Later in the day I looked at my photos. The last picture had a black dot near the moon. When I enlarged it, I was amazed and confused. I did not see anything at the time of the picture. I wish I had. Not sure if I have taking a picture of a ufo?? I looked at the picture in black and white and the top and bottom of the item looks highlighted.