A firm Matrubhumi Assoc. is offering mortgage loans at 3% P.a. Is it genuine or a fraud?

The firm is asking me to pay 5000/- for advocate fees and other charges and asking me to pay 2% stamp Duty on the loan sanctioned amount upfront. Should I get involved or avoid them. There are other such firms all based in New Delhi without any branches or offices anywhere in India. Can it be fraud as the Nigerian Scams. Anyone out there with any bad experiences connected to this or other such firms please share your experiences.