% !TeX program = xelatex 
% Command to run this tex file: xelatex xelatex-make-pdfx-3-2002.tex 
\documentclass{book}

\special { pdf:docinfo << /Title (Volumetric Regimes) /Author (Possible Bodies)>> }
\usepackage[unicode,
            pdfauthor={Possible Bodies},
            pdftitle={Volumetric Regimes},
            pdfdisplaydoctitle,
            pdfsubject={Material cultures of quantified presence},
            pdfkeywords={},
            pdfproducer={Paged.js, Chromium, pdftk, LaTeX},
            pdfcreator={xelatex}]{hyperref}

\usepackage{pdfpages}

% From: https://tex.stackexchange.com/questions/255480/producing-pdf-x-compliant-document-with-xelatex/275914#275914

%%%%%%%%% PDF-X stuff, IF USING xelatex %%%%%%%%%
%(mm size * 72)/25.4 = bp size
\usepackage{atbegshi}
\AtBeginShipout{% %A hook that is executed for every page (after first one)
    \special{pdf: put @thispage
      <<
        /TrimBox [0 0 648 432] %put here other numbers = size of page in bp
      >>
    }
}
\special{pdf: put @thispage
  <<
    /TrimBox [0 0 648 432] %put here other numbers = size of page in bp
  >>
}
\special{pdf:docinfo
  <<
    /GTS_PDFXVersion (PDF/X-3:2002)
    /GTS_PDFXConformance (PDF/X-3:2002)
  >>
}

\special{pdf:put @catalog
<<
  /PageMode /UseNone
  /OutputIntents [
    <<
      /Info (none)
      /Type /OutputIntent
      /S /GTS_PDFX
      /OutputConditionIdentifier (Custom)
      /RegistryName (http://www.color.org/)
    >>
  ]
>>
}

\usepackage{datetime} % for \pdfdate command
\usepackage{hyperref} % for \hypersetup
\hypersetup{
    pdftitle={DocTitle},% PDF/X document should have a title
    pdfinfo={% Setting some more PDF/X stuff for xelatex
        ModDate={D:\pdfdate},% PDF/X document should have a modification date
        Trapped={False},% PDF/X document should have Trapped tag set
    },
}

\begin{document}
\includepdf[pages=-,fitpaper=true]{XXX}
\end{document}