Wrong content of binary test resources when using ClassLoader InputStream

I have a binary file in test resources src/test/resources/file.bin:

$ ls -la src/test/resources

-rw-r--r-- 1 g4s8 g4s8 5125 Apr 30 19:53 file.bin

I'm using it for tests to verify some class. Before testing, I need to copy the content to the file-system, I'm using Thread.currentThread().getContextClassLoader() to read the data:

@Test
public void readsContent(@TempDir final Path tmp) throws Exception {
    final ClassLoader clo = Thread.currentThread().getContextClassLoader();
    final Path file = Files.createFile(tmp.resolve("file.bin"));
    try (
        final InputStream res = new BufferedInputStream(clo.getResourceAsStream("file.bin"));
        final OutputStream out = new BufferedOutputStream(Files.newOutputStream(file, StandardOpenOption.CREATE, StandardOpenOption.WRITE))
    ) {
        byte[] buf = new byte[8192];
        for (int read = res.read(buf); read >= 0; read = res.read(buf)) {
            out.write(buf, 0, read);
        }
    }
    // test code
}

But the content of this file is bigger than expected and it differ from what was in resource file:

$ ls -la /tmp/junit18423574017636618834/

-rw-r--r-- 1 g4s8 g4s8 9350 May  1 12:22 file.bin

The result file is 9350 bytes of size, but source file was 5125. With hex editor I investigated that only first two bytes of these files are the same, all other data is different:

What's wrong with my code? Why this file can't be read correctly using standard way via ClassLoader?