Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3c0f6afa4e2dd8…

MALICIOUS

PDF

14.6 KB Created: 2010-08-29 16:19:36 Authoring application: XiqicalimeNic CikeJotf
MD5: 640dabaf47914175231f4bc82c421625 SHA-1: 797dac79111e5400ecd19fa544891cfcc9e2f0b7 SHA-256: 6d3c0f6afa4e2dd8660b832caf9bb234242fe5ba03924d65b88a642e49d932e3
156 Risk Score

Malware Insights

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

The PDF sample contains XFA forms with executable scripts, a critical finding indicating exploitation. ClamAV detected it as Pdf.Exploit.Dropped-81, suggesting it's designed to drop and execute further malware. The ML classifier also strongly flagged it as malicious. No specific URLs or scripts were directly readable, but the presence of embedded files and script payloads points to a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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.
  • 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 0x19E 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x24D 228 bytes
embedded_file_obj0010.bin
42df327722e1bc5a90c4affb8e3d79ab764e160f6a94ac6a84f2c3e3d05b01dc		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x340 1708 bytes
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x6E9 199 bytes
embedded_file_obj0012.bin
c8ccb81479799528b3fc53ba92ad1e0c5f0ac28a3cac90f2ca78faf985689336		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7DB 29233 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x359C 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x3643 56 bytes

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