Yes, and I’ve personally used this
android fax app to send PDFs without a hitch. You just upload the file from your phone, fill in the fax number, and send. It even supports multiple pages and shows delivery status. It’s super straightforward and doesn’t have the clunky feel a lot of fax apps do. SlashGear featured it for a reason — it really is one of the best options if you’re dealing with PDFs on Android.