Possible to upload PDF or DOC to EM

might be possible but you need custom coding for this to work. you can try to modify template file at events-manager/templates/forms/event-editor.php and then hook into em_event_save filter.

to use template: https://wp-events-plugin.com/documentation/using-template-files/
https://wp-events-plugin.com/tutorials/saving-custom-event-information/

Thank you Angelo!