Halverson and Blaiser Group interview questions

I was offered an interview, however I chose to decline. The hiring manager sent me an email asking me to schedule an interview, but the email sounded like it was written by a scammer. Perhaps it wasn't, but with as many grammatical errors as there were, it certainly raised some red flags, as I know there are certain groups of scammers based in foreign countries who are easily identifiable by their poor English skills.