/usr/lib/pd/extra/iemlib/vcf_hp4~.pd is in pd-iemlib 1.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#X obj 20 48 inlet~;
#X obj 20 358 outlet~;
#X text 69 47 ~signal_in~;
#X text 30 326 ~filtered signal_out~;
#X text 136 353 no arg.;
#X obj 64 77 inlet~;
#X obj 147 104 inlet~;
#X text 193 104 <signal> Q [-];
#X text 110 78 <signal> cutoff_frequency [Hz];
#X text 168 19 for frequency and Q;
#X text 12 8 vcf_hp4~;
#X text 136 7 highpass 4.order with signal-inlets;
#X obj 20 270 vcf_filter~ hp2;
#X obj 20 307 vcf_filter~ hp2;
#X obj 63 217 iem_cot4~;
#X obj 148 132 iem_sqrt4~;
#X text 166 425 IEM KUG;
#X text 150 413 musil;
#X text 180 413 @;
#X text 186 413 iem.at;
#X text 101 402 (c) Thomas Musil 2000 - 2005;
#X text 149 435 Graz \, Austria;
#X connect 0 0 12 0;
#X connect 5 0 14 0;
#X connect 6 0 15 0;
#X connect 12 0 13 0;
#X connect 13 0 1 0;
#X connect 14 0 12 1;
#X connect 14 0 13 1;
#X connect 15 0 12 2;
#X connect 15 0 13 2;
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