/usr/lib/libreoffice/share/extensions/accessodf/ is in libreoffice-accessodf 0.1-4ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/libreoffice/share/extensions/accessodf/Addons.xcu
/usr/lib/libreoffice/share/extensions/accessodf/Factories.xcu
/usr/lib/libreoffice/share/extensions/accessodf/META-INF/
/usr/lib/libreoffice/share/extensions/accessodf/META-INF/manifest.xml
/usr/lib/libreoffice/share/extensions/accessodf/ProtocolHandler.xcu
/usr/lib/libreoffice/share/extensions/accessodf/Settings.xcs
/usr/lib/libreoffice/share/extensions/accessodf/WriterWindowState.xcu
/usr/lib/libreoffice/share/extensions/accessodf/accessodf-addon.jar
/usr/lib/libreoffice/share/extensions/accessodf/description/
/usr/lib/libreoffice/share/extensions/accessodf/description.xml
/usr/lib/libreoffice/share/extensions/accessodf/description/desc_en.txt
/usr/lib/libreoffice/share/extensions/accessodf/dialogs/
/usr/lib/libreoffice/share/extensions/accessodf/dialogs/Dialog.xdl
/usr/lib/libreoffice/share/extensions/accessodf/dialogs/OptionsPage.xdl
/usr/lib/libreoffice/share/extensions/accessodf/help/
/usr/lib/libreoffice/share/extensions/accessodf/help/en/
/usr/lib/libreoffice/share/extensions/accessodf/help/en/be.docarch.accessodf.ooo.accessodfaddon/
/usr/lib/libreoffice/share/extensions/accessodf/help/en/be.docarch.accessodf.ooo.accessodfaddon/checks//
/usr/lib/libreoffice/share/extensions/accessodf/help/en/be.docarch.accessodf.ooo.accessodfaddon/checks/E_HeadingSkip.xhp
/usr/lib/libreoffice/share/extensions/accessodf/help/en/be.docarch.accessodf.ooo.accessodfaddon/main.xhp
/usr/lib/libreoffice/share/extensions/accessodf/images/
/usr/lib/libreoffice/share/extensions/accessodf/images/alert.png
/usr/lib/libreoffice/share/extensions/accessodf/images/alert_20x20.gif
/usr/lib/libreoffice/share/extensions/accessodf/images/ignored.png
/usr/lib/libreoffice/share/extensions/accessodf/images/logo_16x16.png
/usr/lib/libreoffice/share/extensions/accessodf/images/repaired.png
/usr/lib/libreoffice/share/extensions/accessodf/images/warning.png
/usr/lib/libreoffice/share/extensions/accessodf/images/warning_20x20.gif
/usr/lib/libreoffice/share/extensions/accessodf/licenses/
/usr/lib/libreoffice/share/extensions/accessodf/licenses/Lesser General Public License version 3/
/usr/lib/libreoffice/share/extensions/accessodf/licenses/Lesser General Public License version 3/lgpl.txt
/usr/lib/libreoffice/share/extensions/accessodf/licenses/build.xml
/usr/lib/libreoffice/share/extensions/accessodf/licenses/java-header.txt
/usr/lib/libreoffice/share/extensions/accessodf/registry/
/usr/lib/libreoffice/share/extensions/accessodf/registry/data/
/usr/lib/libreoffice/share/extensions/accessodf/registry/data/org/
/usr/lib/libreoffice/share/extensions/accessodf/registry/data/org/openoffice/
/usr/lib/libreoffice/share/extensions/accessodf/registry/data/org/openoffice/Office/
/usr/lib/libreoffice/share/extensions/accessodf/registry/data/org/openoffice/Office/OptionsDialog.xcu