need a quick response about my concern

good day..i hope you can help me in my concern..im a filipino nurse currently here in philippines.i applied online for job vacancy in this hospital ..after 1 month they replied from my application stating im one of the shortlisted for the job..they send me a questionnaire to fill up which include personal details and most about my work experience and asked me to send copies of my relevant documents..after few days i receive and email congratulating me that i passed their standards and send me a soft copy of my contract with signature of the recruitment manager of the hospital..included in my contract is my salary which is far more high than i expected.the email told me which is addressed to the hospital to sign the contract and send back the scan copy and send it also to the ministry of interior there in uae for the procesing of my visa and permit to live in uae..i dont know if the contract is genuine with the signature of the recruitment manager of the hospital with seal also..i checked the contact numbers in the hospital and ministry of interior the numbers are different from the website and from the one written on my contract..please i  need a quick response about my concern..thank you because im having a doubt about the proposed job to me if its real or just a scam