Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6d94d4756ca567…

MALICIOUS

PDF

12.9 KB
MD5: e12c74d415670b9f81af6bfe0bd292ac SHA-1: a88b98e558be9af72bde6111ce65fff7b8706f0d SHA-256: ee6d94d4756ca567c76a3fcf06145cd28fc54642d7f9ee5ebf1efc4ccc52446b
228 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.007 JavaScript

The PDF document contains XFA (XML Forms Architecture) which is known to be a vector for exploits. Heuristics indicate a critical XFA heap spray exploit and embedded script payload. ClamAV detection confirms this as Pdf.Exploit.Agent-6136306-0. The ML classifier also strongly flagged this as malicious. No document body text was available for further analysis, but the presence of exploit code is sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY
    PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium 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.
  • 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/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a8c7f9a23ed57651ea52760928a9e4a6ae6cea8c0abfc01c4b39dd90d0d7497		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12425 bytes

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