Malicious PDF — malware analysis report

Static analysis result for SHA-256 828e0741fdc93ea8…

MALICIOUS

PDF

17.7 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap
MD5: 70457c3054d1e343b6a33ae3826cc2c9 SHA-1: 1fe25dbafb996a7655675334d47e3d30575371b9 SHA-256: 828e0741fdc93ea8015587755c8d17ab59118d76b99fdd4ca6a03db3a99d87c3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file contains embedded script payloads, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. The ClamAV detection of 'Pdf.Exploit.Dropped-81' strongly suggests it's designed to exploit a vulnerability and drop a secondary payload. The presence of multiple embedded files further supports this, as they likely contain the malicious components. The exact nature of the dropped payload cannot be determined from the provided evidence, but the exploit mechanism is clear.

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 0x207 84 bytes
embedded_file_obj0009.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0
pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x2B8 228 bytes
embedded_file_obj0010.bin
9c562385f8abcb8a4b1a37bf127e4e3a9002bade31dd2eb511228267971b7b42
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x3AB 1364 bytes
embedded_file_obj0011.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460
pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x6DA 199 bytes
embedded_file_obj0012.bin
8e86aa949486d101f26e2c6fb40e78c25613d641b972e937869218a1b5a4c015
pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7CC 34065 bytes
embedded_file_obj0013.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876
pdf-embedded-file PDF EmbeddedFile object 13 at offset 0x4241 77 bytes
embedded_file_obj0014.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x42E8 56 bytes