/usr/lib/debug/.build-id/eb/ is in libnss3-dbg 2:3.21-1ubuntu4.
This file is owned by root:root, with mode 0o755.
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    /usr/lib/debug/.build-id/eb/7b87a571474f99271e671ca0806727b4f69fa7.debug
    
 | application/x-executable | root:root | 0o644 | 122.1 KB | 
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    /usr/lib/debug/.build-id/eb/b59854fb25070dbf0dd2ab0587739a29b83642.debug
    
 | application/x-executable | root:root | 0o644 | 111.8 KB |