Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f44828a23f2d58…

MALICIOUS

PDF

45.4 KB
MD5: 7ed27021f8880a8039fc131f7334c87d SHA-1: 3df60690adfbb5e6f1d582f5fc8aa1c2303dcc3e SHA-256: e2f44828a23f2d58e73e8dc441f007f4369c05952351c17d2caab9641cfd2708
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Heuristics.PDF.ObfuscatedNameObject' further suggests malicious intent. While the document body is heavily obfuscated and unreadable, the presence of JavaScript and XFA form elements points to an attack pattern designed to exploit these features to execute arbitrary code. The embedded JavaScript likely downloads and executes a second-stage payload, though its exact function cannot be determined due to obfuscation.

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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 http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
08b3c3e2464dd203897e6b287f8cbba123f744055bee33e737ee46a03061526c
pdf-javascript-stream PDF /JS object 12 at offset 0xA1E6 3806 bytes