Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ec82763fff1b02…

MALICIOUS

PDF

12.7 KB
MD5: 75ada3a09e0a383f931f8269db584408 SHA-1: 73066e66ae11516be3213ab6505872d88c484424 SHA-256: 24ec82763fff1b02da621cb72e592091b4ef3f1d4a1b37281a6cafa5245dcc4d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter

The PDF document contains XFA (XML Forms Architecture) which is known to be vulnerable to heap spray attacks. The critical heuristic 'PDF_XFA_HEAP_SPRAY' indicates the presence of exploit code designed to leverage this vulnerability. The 'PDF_XFA_SCRIPT' and 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristics further confirm that executable script content is embedded within the PDF, likely to trigger the exploit. This suggests the document is designed to download and execute a second-stage payload.

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
7e326c9f0ab8be2e31b108f0c9a04857d57e2ed9385dbd37798ec1179cfde9cd		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 12261 bytes

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