doc/mkdocs-material/material/templates/.icons/material/file-presentation-box.svg

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 16H5V8h14m0-5H5c-1.11 0-2 .89-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2V5a2 2 0 0 0-2-2"/></svg>