Before assuming the file is a PyInstaller archive, check its internal strings and binary layout.
Open the .exe or binary file in a hex editor (like HxD) or run the strings command in your terminal. Search for keywords such as pyi_ , PyInstaller , _MEI , or pyunipkg . If these strings are entirely missing, the file was not built with PyInstaller. Before assuming the file is a PyInstaller archive,
The PyInstaller version used to create the executable does not match the version pyinstxtractor expects. Newer PyInstaller versions (4.0+) introduced cookie structure changes. Before assuming the file is a PyInstaller archive,