I has the pptx idea (attached file with minor details) to make something like that:
A login page (all other pages, password restricted)
A home page with all auctions already saved (or none), a upload file form (with date, file and name required), user control form some users (like me) and auction manegement page (to exclude some old auction).
The upload file is like the attacheds files (edital, EV0053...), the tables in it is the most important thing.
The "[login to view URL]" (or .pptx) is the real guide to this project, please check it before place a budget here. The xlsx file is also important to check.
Pages must be php and the original file (uploaded by me) must be clickable inside auction page.
The "examples" in [login to view URL] is only for that, examplification. Please, I believe the real project will be better design
If you have any questions, please fee free to ask me (specially with my bad english, it is probable that will be questions)... I will try to answer it all.