Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d69c21b974e8a96…

MALICIOUS

PDF

17.7 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 91472106c694d27d9682e5f411ab021e SHA-1: dfdd009a42912ac848f2ff429c80865d44d04722 SHA-256: 0d69c21b974e8a9603d6bb8f356ed52a23a3e4df4d1a884c10949c41a8919b68
198 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file exhibits multiple high-severity heuristic firings, including PDF_EVAL and PDF_XFA_SCRIPT, indicating the presence of executable script within an XFA form. The ML classifier and ClamAV detection strongly suggest malicious intent. The primary attack vector appears to be exploitation for client execution, likely involving a JavaScript payload that downloads further malicious content, as suggested by the embedded file artifacts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 8

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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 script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x1E5 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x294 228 bytes
embedded_file_obj0010.bin
1634f831fed65f8e4d19c491bb0776f5135435b13cbacea4c4e5c5583a6c620b		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x387 1278 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x69B 199 bytes
embedded_file_obj0012.bin
535afec6c08ee8c969e603098580d89791cafd0f8f8318cc4f116e1f2e909877		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x78D 34271 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x4226 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x42CD 56 bytes

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