/usr/lib/x86_64-linux-gnu/ is in libgdcm2-dev 2.8.4-1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/libgdcmDICT.so
/usr/lib/x86_64-linux-gnu/libgdcmDSED.so
/usr/lib/x86_64-linux-gnu/libgdcmIOD.so
/usr/lib/x86_64-linux-gnu/libgdcmMEXD.so
/usr/lib/x86_64-linux-gnu/libgdcmMSFF.so
/usr/lib/x86_64-linux-gnu/libgdcmjpeg12.so
/usr/lib/x86_64-linux-gnu/gdcm-2.8/
/usr/lib/x86_64-linux-gnu/libgdcmjpeg16.so
/usr/lib/x86_64-linux-gnu/gdcm-2.8/GDCMConfig.cmake
/usr/lib/x86_64-linux-gnu/gdcm-2.8/GDCMConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/gdcm-2.8/GDCMTargets-none.cmake
/usr/lib/x86_64-linux-gnu/gdcm-2.8/GDCMTargets.cmake
/usr/lib/x86_64-linux-gnu/gdcm-2.8/UseGDCM.cmake
/usr/lib/x86_64-linux-gnu/libgdcmCommon.so
/usr/lib/x86_64-linux-gnu/libgdcmjpeg8.so