That .exe file looks fine…
But is it really safe?
Before you open it, here’s how to analyze a file’s behavior — without ever launching it.
✅ 1. Check file size and type
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Is it unusually small for the app it claims to be? (e.g., 100 KB installer)
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Does the extension match the content?
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something.pdf.exe→ Red flag -
.scr,.bat,.vbs,.jar→ be cautious
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✅ Real software usually has consistent naming and normal file sizes.
✅ 2. Use VirusTotal
Upload your file at https://www.virustotal.com
It shows:
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Virus detections from 70+ engines
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Embedded behaviors (e.g., network access, file creation)
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Community comments and tags
✅ If multiple detections: delete it.
✅ 3. Check digital signature
Right-click the file → Properties → Digital Signatures tab
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Genuine apps have verified publisher signatures (e.g., Microsoft, Adobe)
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If it says Unknown Publisher or no tab at all — proceed carefully
✅ 4. Use PE analysis tools
Try:
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Exeinfo PE – shows compiler info, packers, known behaviors
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PEStudio – detailed static analysis, API calls, entropy checks
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CFF Explorer – manual inspection of file structure
✅ These show if the file is packed, encrypted, or uses suspicious functions.
✅ 5. Watch metadata and creation date
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Right-click → Properties → Check date modified/created
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Files created recently (within minutes of download) can be fake
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If the company name or description is missing → be suspicious
Key points to remember
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You don’t have to run a file to find out it’s bad
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Check extensions, file size, and digital signatures first
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Use VirusTotal and static analysis tools for safe inspection
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If something feels off — trust your instinct
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Better to delete than to disinfect later