Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5ac169048230e9…

MALICIOUS

PDF

2.7 KB
MD5: fdd0b43195787ed6f4e357b73f359829 SHA-1: c45b3a5857531bc3eba927118ae013dd2a7be6e4 SHA-256: 6e5ac169048230e92962986595b263b04760fe8e3fab1f77f32c845e73e33ed7
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and is flagged as a PDF JavaScript exploit cluster, indicating it likely attempts to exploit a vulnerability. The script itself is heavily obfuscated but appears to construct a URL for a second-stage payload. The presence of 'test.swf' in the document body suggests a potential Flash exploit or related content, further supporting the exploitation vector. The benign URLs are likely decoys or unrelated schema references.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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_obj0006_000.js
12f3c47d6deafb80093bd32c2a6874d7441afd93747ddd8e950c79692e040a91		 pdf-javascript-stream PDF /JS object 6 at offset 0x106 1561 bytes

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