• Meet the eligibility criteria.
  

• Submit the application form
  

• Appear for the entrance examination (HITSEEE)
  

• Shortlisted on the basis of HITSEEE Merit list
  

• Document verification
  

• Fee payment

Yeah! It can be a fake message or a message that is issued in general to attract students. VK-PTHFDR (as per internet research) can be Pathfinder Publishing or Pathfinder Educational Institute.

So you shouldn't focus on such message and the college you will get will be via JOSAA counselling which is to be organized after Rank list is issued by NTA.

Now Hinudstan University is a private university in chennai.

You can visit the link below to know more about Hindustan University/HITS chennai:

https://www.careers360.com/university/hindustan-institute-of-technology-and-science-chennai

I hope this answer helps. All the very best for your future endeavors!