/usr/lib/libreoffice/program/pagein-writer is in libreoffice-common 1:3.5.2-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | libswlo.so
libswuilo.so
libsvxlo.so
libsvxcorelo.so
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