[Q] Is there any way to root my tablet?

Tab Information:
I installed goo.im and on the tab i saw thats:
Ganbarou- GT-P7500-V1.00.2012.09.23.zip - kyanrom jellybean blade alpha , MIUI BLADE
STOCK SmoothROM-_jro03s.zip
Model: GT-P7500
android vers.:3.2
mainband:P7500JTLB1



The tab was given to me from the company and restricted feature a lot of tablet. I tried several ways for root but I cant flash it .
I need right md5 or tar file but i cant found it.
I found CSC and its working (CSC_P7510OXAKFC) but i cant found correct PDA file.
The model of the back of device is GT-P7500 , AND 3G, Wi-Fi, 16GB.
The tab has custom rom and i can't find any update for it. locked and recovery mod is disabled. When i using Odin for .tar or md5 files my tab is say: Invalid Binary Signature.
With ADB i can see device and i can reboot but have'nt fastboot mode.

I understand that the actual room is hidden as .
I can not think of anything now.
Do you have any idea about this problem?