Storing coins in a corrugated box is never a good idea. Cardboard quickly absorbs any moisture in the air, and the contents inside the box will suffer from oxidation.
Place a box in a closed closet for a week (provided there is no humidity) and they will dry out. As boxes dry out, most emit a distinct odor. Pu your coins in plastic zip bags with a desiccant pack. I save desiccant packs from products I purchase that include the packs.