\documentclass[a4paper]{scrartcl}
\usepackage{hyperref}   % links im text
\pagenumbering{gobble} % disable page numbering

\hypersetup{
  pdfauthor   = {Martin Thoma},
  pdfkeywords = {Blank PDF},
  pdftitle    = {Blank PDF}
}

\begin{document}
~
\end{document}