How to display a previously uploaded pdf inside a pdf viewer in an AEM adaptive form ?

Hi all, 

I have an adaptive form, where users upload and save some documents.   On Retrieve of the application, the documents are visible and users are able to download and open the document.

I would like to see, if it is possible to display the previously uploaded document inside a pdf viewer as opposed to downloading it for the user. Is this possible? how to achieve this? and what are the implications of such a functionality? Using AEM 6.5 Adaptive form.

Best Regards,