If this file is related to a specific project, assignment, or a known, legitimate tool, please provide more context so I can properly assist you. If you can provide:
Based on a thorough search, there is no credible, public information or file named "Dwhore.Rebecca.1.7z" recognized in security, academic, or professional databases.
you found this file (e.g., a specific website, email, or forum)
Use a reputable antivirus program (like VirusTotal ) to scan the file without opening it.
What you were told about it (e.g., "it's a game mod", "it's a hacking tool")