Malicious PDF — malware analysis report

Static analysis result for SHA-256 d43e0bb35c281ebc…

MALICIOUS

PDF

17.8 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 5d07feda375e5db1142d01fbc03b3d9b SHA-1: 3e3f2896ea3d686a244b786640ccfdf6210c4d21 SHA-256: d43e0bb35c281ebc2377c7c519bec9df4e28071aa47a8f0e44395a6c1211ee82
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1105 Ingress Tool Transfer

The critical heuristic 'CLAMAV_DETECTION: Pdf.Exploit.Dropped-81' and the high heuristic 'PDF_XFA_SCRIPT' indicate that this PDF file contains malicious executable script within an XFA form. This script is likely designed to exploit a vulnerability, leading to the download and execution of a secondary payload, as suggested by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' firing. The embedded file artifacts further support the nature of this dropper.

Heuristics 5

  • 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 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

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 0x213 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x2C4 228 bytes
embedded_file_obj0010.bin
354af0573f0809da976a2e648ed5f524e1079d14054184d2aade3b24b64151c4		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x3B7 1386 bytes
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x6EA 199 bytes
embedded_file_obj0012.bin
cacab694f70551d6e8e30855151dc7a0e8ac74080cf62f7aefe767b427059108		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7DC 34107 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x4275 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x431C 56 bytes

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