How to pull data from attachment?

I am trying to pull data from an excel file into a form or text box.

I have tried using importTextData, which works on a one-by-one basis, but can this be used to pull an attached file?

The end result that i'm hoping for (in case there is a better way to do this) is this:

My PDF will be a map with several points on it. I would like each point to be a clickable button/link, and when the user clicks on the point, either a text box pops up with additional info on that site, or there is a form/side panel that displays the additional info.