Malicious PDF — malware analysis report

Static analysis result for SHA-256 a84c2d15731860e8…

MALICIOUS

PDF

9.0 KB Authoring application: null
MD5: d794c4f412809675f2554e3bac685684 SHA-1: 8d258eaa28dd9a94e159e6071e36602dab7a3fd8 SHA-256: a84c2d15731860e88c2417e3b43efb544b6e9fe8a6638e714faad00a567f0362
114 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript, which is flagged as malicious and correlated with other PDF-specific malicious signals. The ML classifier also strongly indicated maliciousness. While the document body appears to be a sales confirmation, the presence of malicious JavaScript suggests an attempt to download and execute a second-stage payload. The benign reputation of the URLs does not negate the malicious JavaScript findings.

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