Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2deb3b0a41f989…

MALICIOUS

PDF

4.2 KB
MD5: 93f523a3e1f8c8ab950b85e36d8850cb SHA-1: e35fb787e9e065fbfc5ba45e0be9fb138247104a SHA-256: 3a2deb3b0a41f989ce23b3574ef01550a8df4cd402b8704316d656420532bd42
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file contains embedded and obfuscated JavaScript, along with ASCIIHexDecode and ASCII85Decode filters, which are common techniques for delivering malicious payloads. ClamAV also flagged this file as Heuristics.PDF.ObfuscatedNameObject, indicating a high likelihood of malicious intent. The specific payload or exploit mechanism is not detailed, but the obfuscation and decoding point towards an attempt to execute arbitrary code.

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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