/usr/lib/x86_64-linux-gnu/libpcreposix.so.3 is in libpcre3 2:8.35-3.3+deb8u4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libpcreposix.so.3.13.1
/usr/lib/x86_64-linux-gnu/libpcreposix.so.3.13.1