Offered Contract Job by Chevron Nigeria Ltd. (Lagos)

A recruitment agency, bestwayrecruitment, approached me through email offering a contract job by Chevron Nigeria Ltd. The job package is highly attractive. Though I need to get some feedback or advise from fellow expat about the genuity of this offer since I've not gone through any face to face interview with any Chevron Nigeria Ltd.

The offer came to me by suprise and I got a bit worry and have a feel that this is a scam. I haven't involved myself with any money transaction with any party so far.

Please advise. Thank you.