Can't root Samsung Galaxy Grand 2

I cannot root my Samsung Galaxy Grand 2 SM-G7102 4.4.2. I tried many ways from here none of them worked. I got RESET msg in Odin instead of PASS and even when flashing zip through recovery it says Footer is wrong, Signature Verification failed. I got SuperSu app but while opening it, I got error like 'There is no SU binary installed you cannot install super su.'
Please help me to root my phone with full procedure and even to install CWM Recovery.