I guess that when starting a movie like "The White Raven", a team has two basic choices. They can make a James Bond type of film in which the hero will keep falling into traps most terrible from which he will miraculously escape with his life and tie undisturbed - which is quite OK because we all know in advance that he is indestructible. Or they can make a realistic movie in which the hero is very much destructible and has to depend solely on his wits and on some more or less sympathetic people to survive - if he does survive at all; we can never be sure.
And then there is the third type which tries to combine the first two - which seems to be a sure formula for disaster. "The White Raven" is, of course, just one of many such movies which may start, as this one does, quite decently in the realistic direction and then suddenly turn around, becoming more and more laughable right to the last "deus ex machina" (in this case one of the most stupid I have ever seen).
As such, the movie could perhaps be enjoyed as an unintentional parody if it were not for repeatedly ghoulish scenes which make one think that its authors are fetishists of a rather unpleasant sort; and only to their kind can "The White Raven" be safely recommended.
