Share PDF, only reade permission, for multiples users.

Hello support.

I need to criate a simple project as:
* Access with login/password;
-- Users as member of two groups (student or parents)
* Access to the user will have access a list of PDF documents, only read, do not download permission;
* When accessing a document the system must store the access date and any comments from documents.

So, i do not know where to start. Is there any theme that does this?

Thanks for support.

Rodrigo.