Well, now we have the proof!!! Look at the bottom right of the picture.

And now for the story behind the story:
"Mostafa Kamal, production manager of Azad Products, the Dhaka shop that made the posters, told the AP he had gotten the images off the Internet.
"We did not give the pictures a second look or realize what they signified until you pointed it out to us,'' he said
The company had printed about 2,000 posters, and they were snapped up by the demonstrators, who were angry over the U.S.-led attacks on Afghanistan.
Kamal said he would leave out the controversial images from his next posters. "