/usr/share/cli-common/packages.d/liblog4net1.2-cil.installcligac is in liblog4net1.2-cil 1.2.10+dfsg-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1
/usr/lib/cli/log4net-1.2/log4net.dll