Had this problem a while back when I needed a logo SVG in a PDF brand guidelines document. I ended up asking one of the UX designers who had a Adobe Creative Cloud subscription. This is how to extract it for free on your own.
- Install Inkscape
- Open the PDF file and select the page the image is on
- Select the image and copy
- Open a new Inkscape page, paste the image
- Edit -> Resize Page to Select or Shift + Ctrl + R
- Save (dat money)
