The pyext6cc8cd package version 1.0.0 on PyPI contains malicious code in its setup.py that executes arbitrary commands during installation. Specifically, it decodes a hex string to run the macOS Calculator application via subprocess.Popen unconditionally before the package setup completes. This behavior demonstrates that the package runs untrusted code at install time, posing a risk of arbitrary command execution. The package metadata is placeholder and it contains no functional code, indicating it is a proof-of-concept or test artifact. The obfuscation technique used to hide the command is designed to evade detection by scanners. While the current payload is benign, it could be replaced with destructive or data-exfiltration commands.