You can attach a picture from the Photos hub and Word, Excel, and PowerPoint files to an email. You can also share a video as an email attachment from the albums.To attach a document, it must be either stored on Office hub or attached to an email that you received. It is currently not possible to add the Office document to an email reply. You can attach a picture from any of yours photo albums, even you have not saved it to your phone.If you want to send more than one Office document or video, you will need a message for each attachment. You can attach multiple pictures to an email.
If you are looking for information about sharing PDF documents, you can use the search field on this page to find the related FAQ: Can I attach and send PDF file from an email account on my Nokia Lumia phone?