Raven is not “Genus Corvus”. The raven in the story is one particular species in the genus Corvus, to whit Corvus corax. Note that the raven buries nothing, just scratches the ground a bit. That’s really not a complicated behavior. It doesn’t involve tools, just feet, and there is no funeral indicated. Now “raven” is just a name for a large bird in the genus, while smaller ones are generally called crows. It has no phylogenetic meaning. As far as I know, no raven has been found to use tools, though several species of crows have. I doubt there is any way to detect God Guidance, and I doubt the ability to scratch on the ground is specifically encoded in a raven’s DNA anyway. There are particular behaviors that have a genetic basis, but I don’t think that’s one of them.
Added: Ravens have been known to use tools in experiments with captive birds, but not, as far as I know, in the wild.