I agree that the case is circumstantial, but I think it is strong. Abracadabra looks like it is a mixed Aramaic and Aramaicized Hebrew phrase אברא כדברא, which would mean something like "I create according to the word" (perhaps meaning "I create as I speak"). The translation offered in the article looks a bit off.
For the philological specifics, see here. And for more posts on Abracadabra, follow the links from there and from here.
Visit PaleoJudaica daily for the latest news on ancient Judaism and the biblical world.