Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e004c8c4d049ef2…

MALICIOUS

PDF

925.5 KB Created: BFO&;á0²LÇp]M9¹?ÝËJ8˜ÆGmÜw°.ېp’`›’¸^ÐóNÝ©» Authoring application: Rêî®t»ÍÕ¨]àÞÿ?Æ×Ñó¬yÜzYJCD°·ñp™¢szÔ\-|ݮϭHcv (via /å=ùìO]ÄM"@?§ï‰™¹jv2ˆ.ø`­\]5øùg ~gÞl¨¡^pfP)
MD5: 0970c72035340e550e7c979011e8413b SHA-1: a3257e6abb8dd5e0f0b69e86cb779dcbf9665a6f SHA-256: 3e004c8c4d049ef2836a096b25949885cdd98159daddf1a9f9571c4f25fb43ee
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript, which is used to obscure malicious content and bypass static analysis. The presence of JavaScript actions and an encrypted PDF with JavaScript references strongly suggests it functions as a dropper, likely downloading and executing a second-stage payload. The ClamAV detection name 'Pdf.Dropper.Agent-6290497-0' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 7

  • ClamAV: Pdf.Dropper.Agent-6290497-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-6290497-0
  • Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS
    PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.

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