Sure looks like soft maple. Hardly seems likely that pallet grade lumber would be exported to the Far East, though.
Strong seasonal differences which we in the temperate latitudes call "annual rings," say it's not likely from the islands, where climate is pretty steady. Could be latitude, altitude, or monsoon, but this tree has had some changes in its life. Other than that, it does not appear to have the vascular structure of a tree which has to deal with a lot of water or height.
I suppose that the best thing to say is to echo Woodwish. It was free. You may, however, never see its like again. Unless you want some soft maple. I used to use dunnage acquired on Guam for woodworking, but it was a case of first sorting for similar if constructing anything large. Nobody puts SKU stickers on trash!
