Resume upload web shell

I wonder how many job application sites accept web shell uploads instead of regular resumes (or other types of uploads). I know how you can inject PHP into exif headers but I wonder if there's a way to fool a site into thinking an upload is a word document or PDF when it's actually a PHP shell.

I don't think Content-Range works with uploads on the majority of servers out there, it's a rare and nonstandard feature.

http://www.grid.net.ru/nginx/resumable_uploads.en.html