$ perl -e '-B q{perl-5.38.0.tar.gz} and warn "binary file\n"'
binary file

$ file perl-5.38.0.tar.gz
perl-5.38.0.tar.gz: gzip compressed data, last modified: Sun Jul  2 22:26:17 2023, max compression, from Unix, original size modulo 2^32 97505280

$ perl -e '-B q{/usr/bin/perl} and warn "binary file\n"'
binary file

$ file /usr/bin/perl
/usr/bin/perl: ELF 64-bit LSB pie executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=6ecb6a6b0956a41de73c75facebcb500b525b860, for GNU/Linux 3.2.0, stripped