Malicious PDF — malware analysis report

Static analysis result for SHA-256 42addf9f134345b2…

MALICIOUS

PDF

8.7 KB Authoring application: null
MD5: 9e179ea858e38483dc80223a7b644931 SHA-1: 29fd1e6d6451a2e95432487ebd0a78f37fb24b6d SHA-256: 42addf9f134345b25b4d9947b269a2b5942b67601f46bd48f2e3ec1b10318d5e
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, flagged by multiple heuristics as malicious and correlated with the ML classifier. The document body mimics a sales confirmation for PGP software, including a download link, suggesting a social engineering lure to trick the user into executing the embedded malicious script. The script's exact function is not discernible due to obfuscation, but its presence and the document's deceptive nature strongly indicate it's designed to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Correlated malicious PDF JavaScript signals critical PDF_CORRELATED_MALICIOUS_JS
    PDF JavaScript or auto-action content is corroborated by exploit staging, ML, or suspicious extracted-artifact findings. This correlation promotes old exploit-kit PDFs that otherwise remain in the suspicious band because each individual signal is intentionally weighted conservatively.
  • 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.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://customers.pgp.com/download/lookup?oid=1248198-0f2b1e4cb5db36f055803cb40f5735fe
    • https://support.pgp.com