/usr/share/pandoc/data/docx/ is in pandoc-data 1.16.0.2~dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pandoc/data/docx/[Content_Types].xml
/usr/share/pandoc/data/docx/_rels/
/usr/share/pandoc/data/docx/_rels/.rels
/usr/share/pandoc/data/docx/docProps/
/usr/share/pandoc/data/docx/docProps/app.xml
/usr/share/pandoc/data/docx/docProps/core.xml
/usr/share/pandoc/data/docx/word/
/usr/share/pandoc/data/docx/word/_rels/
/usr/share/pandoc/data/docx/word/_rels/document.xml.rels
/usr/share/pandoc/data/docx/word/_rels/footnotes.xml.rels
/usr/share/pandoc/data/docx/word/document.xml
/usr/share/pandoc/data/docx/word/fontTable.xml
/usr/share/pandoc/data/docx/word/footnotes.xml
/usr/share/pandoc/data/docx/word/numbering.xml
/usr/share/pandoc/data/docx/word/settings.xml
/usr/share/pandoc/data/docx/word/styles.xml
/usr/share/pandoc/data/docx/word/theme/
/usr/share/pandoc/data/docx/word/theme/theme1.xml
/usr/share/pandoc/data/docx/word/webSettings.xml