How to display description of uploaded media

Hi,
I am making a site which will contain quite a few downloadable .pdf documents.

I can see how to add a .pdf document into to a page then add a title, caption & description.
I also understand I can choose whether the resulting link goes straight to the document or to another page containing a link to the document with the description underneath.

However, what I’d really like to do is list each document link with it’s description on the first page;

Failing that, I would like to edit the second page that lists the link followed by the description, but can’t find where to edit it.

The closest I can find is image.php, but editing that doesn’t seem to affect that second page…

(I’ve found references to ‘attachment.php’ but that doesn’t exist in my /wp_content/themes/default/ folder, and when I created one from image.php, it displayed the description but not the link to the file..)

Have also looked for a plugin that might manage the files somehow, but haven’t found one that has such simple functionality..

Any help greatly appreciated!
Thanks