Hi Heart0,
zeebest, is right about this one. Neither Joomla nor any extension of Joomla is able to take a static pdf and automatically convert it to an online form.
What you have to do is use a forms extension from the Joomla Extension Directory and recreate the form so that it is able to work on the web (because pdf are made for print, not for web submission):
extensions.joomla.org/extensions/contacts-and-feedback/forms The forms extension will do all the behind the scenes work for and create all the code necessary to submit, save, and send the information.
Any of the top 12 on the list are good choices to look at. This is one area at which Joomla really excels and we have a lot of great extensions available to us.
Try to go through each of them and look at their features, reviews, and demos and fit the one that fits best for you. BreezingForms is a very good choice for simplicity and overall dependability, while BfForms and ChronoForms have more advanced features in comparison to the rest.
Hope this helps! Let us know if you have any questions! :)
Kind regards,
Nick