/usr/lib/x86_64-linux-gnu/pkgconfig/poppler-cairo.pc is in libpoppler-dev 0.62.0-2ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | prefix=/usr
libdir=/usr/lib/x86_64-linux-gnu
includedir=/usr/include
Name: poppler-cairo
Description: Cairo backend for Poppler PDF rendering library
Version: 0.62.0
Requires: poppler = 0.62.0 cairo >= 1.10.0
|