Malicious PDF — malware analysis report

Static analysis result for SHA-256 3408365f6014d084…

MALICIOUS

PDF

44.9 KB
MD5: 4f67054f438a19aab9d150af86162996 SHA-1: 381d37d1f80c4cedcc8cd905992460084899727e SHA-256: 3408365f6014d084c173d9d1b2fef121d9d49b7d1e86ec504d58b0353bb9f17a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains obfuscated JavaScript, flagged as a PDF JavaScript exploit cluster and malicious by ML classifiers. The JavaScript is designed to download and execute a second-stage payload, indicated by the exploit cluster heuristic and the nature of embedded JavaScript in malicious PDFs. While the specific URLs extracted are benign, the presence of exploit code strongly suggests malicious intent, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9595

Heuristics 6

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • 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
5932304eb0aab077b496ffc396cad4290593a0a57cd9c1084da608796651e910		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1FA 3361 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.