I would feel out the interview process and take a good look at the contract. I had an interview like that where the school didn't have a website. I had some Korean friends look into it and they only found out the location. The interview consisted of the president's daughter telling me about the school and her experiences in the US. She didn't ask me a single question. Less than 5 minutes after the "interview," one of my recruiters called and said that I was hired and asked if I accepted the job. When I looked at the contract, it was devoid of detail and looked like a generic contract that someone whipped up on a Word document.
So my advice is, if your experience is anything like that one, don't accept the offer. But if you feel the interview is legit, the contract is detailed, and you trust the recruiter your working with, then by all means.