8 0 h g

$ convert champ1.pdf champ1.jpg
convert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error/constitute.c/IsCoderAuthorized/421.
convert-im6.q16: no images defined `champ1.jpg' @ error/convert.c/ConvertImageCommand/3229.

# vim /etc/ImageMagick-6/policy.xml

 <!-- commenter ces lignes
  <policy domain="coder" rights="none" pattern="PS" />
  <policy domain="coder" rights="none" pattern="PS2" />
  <policy domain="coder" rights="none" pattern="PS3" />
  <policy domain="coder" rights="none" pattern="EPS" />
  <policy domain="coder" rights="none" pattern="PDF" />
  <policy domain="coder" rights="none" pattern="XPS" />
-->

Et ça marche

Source : https://bugs.archlinux.org/task/60580