Employee Fraud In Oman

I am an ACCA , frm Pakistan. I hv offr of a job in Oman in accounts department by a private SME, but he has not confirmed an employment and is asking me to come to oman for 20 days on his expense. but i am a bit scared that he is sending me visa n ticket on his expense as i had no formal interview with the company also. I am afraid if i get a victim of any kind of fraud.. please help me in this regards.