Borneo, Sabah. I thought this is a female of Eburiomorpha guttata, but two details make me doubt: a small size (15 mm) and elongated postmedial white spots in elytra.
I think it is just a small specimen. Common American Eburia can have wide variation in the size and length of their eburneous markings. So I would expect this species (which is not rare) to have the same variation.