The financing for Pernicious came principally from Thailand and Bressack shot the entire film there in English using a set of no-name American actresses in the central roles. By its very choice of title, Pernicious gives the impression of being another in the line of copycat films that take their lead from Insidious (2010) in their use of a sinister sounding adjective as title.
Pernicious is a film that you end up hating within its opening moments. The self-absorption of the central characters, their blithe indifference to local culture and insulting treatment of the locals talking down to them slowly and simply like you would to a child at one point switches you off in a big way. At least the film reaches an ending where such attitudes would seem to be intentional but it also serves to create zero empathy for the girls when the film starts putting them on the receiving end of spooky phenomena.
More so than that, Pernicious is a badly made film. James Cullen Bressack demonstrates little affinity for the spooky scenes and the entire film looks as though it has been quickly shot on video. The appearance of the kumari looks like a low-rent version of Sadako from the Ring films. It is represented by some tatty CGI effects that at various points cause you to laugh more than be spooked in particular, one image of it appearing out of the tap in a bath.
The early scenes leave you wondering what is going on the girls encounter three guys at a bar (led by Russell Geoffrey Banks with an incredibly fake British accent) and take them home only for the guys to spike their drinks. Without warning, James Cullen Bressack abruptly switches into Torture Porn territory with each of the girls killing one of the guys. We get scenes of the girls gouging out the guys eyeballs, cutting out tongues and chipping their teeth out with a machete, all shown in graphic detail. What makes such a scene ludicrous is the fact that all the girls are dressed in fashionable lingerie and underwear as they torture the guys. The film then switches back to normal happenings the girls seem more concerned about what happened to the statue than the disappearance of the guys, leaving you wondering WTF just happened. It is a scene that belongs more in a film like Hostel (2005) and feels especially out of place when the rest of Pernicious plays itself out more along the lines of an Asian ghost story, which is built on spooky atmosphere rather than sadistic extremes.