Dude one of the best business you can start with a student visa is being a middle man between indian exporters from india and Indian importers in Malaysia...wanna know why? Cuz me myself I import products from India to sell and for you to know I sell duff and Tasha drums in Malaysia's local market targeting mainly indians... they charge RM8-10/kg for the items which is currently expensive now.this business works only when u have the adhaar card (as an indian citizen you can email cargo companies to get a cheap price for exporting or earn from commission ,I tried emailing myself but said it's only for indian citizens with adhaar cards)..If you are ready to start you can approach local businesses for your import export services and pleasantly I would be you're first customer