Mold for sure. I'm guessing the box got over humidified at some point in it's life. IMVHO, it's not worth the risk to return this box ... not for just a 10-count. I'd email/call though and let them know, maybe they can give you a discount or some free singles with your next order or something.
The mold doesn't appear to be too bad from these pictures. It happens, and although it's obviously disheartening on a box of cigars you just received, it should not ruin the cigars, no. A cigar can really only be unsmokable due to mold when the mold grows into the foot of the cigar, infecting the filler. If it's just on the wrapper, it can be cleaned off (though it may discolor the wrapper depending on the strain of mold).
I've had cigars arrive with mold a number of times. So far, all the previously-moldy cigars I've smoked have been just fine!!
Step 1: Wipe off the cigars with a slighly damp cloth (don't use a paper towel as they tend to leave little bits of themselves all over the cigars). Make sure you keep rotating the towel as not to put the mold back on the cigars, lol!
Step 2: Wipe down the inside of the box/paper as well
Step 3: Dry off the cigars and box
Step 4: If you use storage bins (i.e. whole-box storage of cigars), go ahead and put the box in there. If you use traditional humidors, though, I'd suggest storing these in a ziplock bag instead for a few weeks (with a small humipack or something). You can do this either way, of course, if you're paranoid about the mold spreading.
Step 5: Check them every few days to make sure there is no return of the mold. After a few weeks they should be fine for long-term storage.