drag & drop from mvc to pdf

I have a project that i need some direction what tools should be used to achieve.

Assume I have mvc website. and left side is nav. bar with buttons (called checkbox and textbox).
on the right side it is iframe with embredded with selected PDf document.

Now, I hope to drag & drop textbox from the left side nav and drop on the pdf document, and allow the user to name the textbox.
basically, it is drag and drop function you see all time to html webpage. But instead, it is pdf in my case.

Do you know any plugin I can use to achieve this that work with .net mvc?