There no way to tell without knowing what sort of executable it is ?
Is it a wrapped zip/rar self extractor , a custom installer, windows resources, something else ?
if you don't know what it is, load it into notepad or wordpad and scan it for recognisable text with maybe a copyight pkware or such give a clue to what it is. Typically theylll be close to the top of the file if its a self extractor.
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