/usr/lib/x86_64-linux-gnu/libboinc.so.7 is in libboinc7 7.6.31+dfsg-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libboinc.so.7.6.31
/usr/lib/x86_64-linux-gnu/libboinc.so.7.6.31