/usr/lib/x86_64-linux-gnu/libelf.so.1 is in libelf1 0.152-1ubuntu3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libelf-0.152.so
/usr/lib/x86_64-linux-gnu/libelf-0.152.so