Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe12466b4b7ea721…

MALICIOUS

PDF

36.0 KB Created: 2010-12-16 17:36:51 Authoring application: fiz gob
MD5: a7de353770e4327aa9b9ab379e6ad4e3 SHA-1: eaffea1ae761e10e6965f242412a32c1c661e87e SHA-256: fe12466b4b7ea72154bad5f5705daef65b8c6f9d5eccd00e0723339cf59f3f3e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell T1566.002 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Dropper.Agent-7328738-0 and flagged by an ML classifier with high confidence. Heuristics indicate the presence of embedded scripts and potentially exploit-related filters. The embedded file object, obj0006.bin, is significantly larger than others, suggesting it may contain the primary payload. The overall behavior points to a dropper or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7328738-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7328738-0
  • 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
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0018.bin
d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777		 pdf-embedded-file PDF EmbeddedFile object 18 at offset 0x16C1 84 bytes
embedded_file_obj0017.bin
24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0		 pdf-embedded-file PDF EmbeddedFile object 17 at offset 0x1788 228 bytes
embedded_file_obj0003.bin
c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460		 pdf-embedded-file PDF EmbeddedFile object 3 at offset 0x1902 199 bytes
embedded_file_obj0012.bin
3a0ea28832d2c211ea644e0666d39b62f71a49b31bbea9d5b4628e119fa03cc3		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x1A59 119 bytes
embedded_file_obj0007.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x1B4A 77 bytes
embedded_file_obj0008.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x1C07 56 bytes
embedded_file_obj0006.bin
f47fe6b438cfda2bf5bc75ca19163e3201fbb02edcde459ef6bd2753908a77eb		 pdf-embedded-file PDF EmbeddedFile object 6 at offset 0x1F4C 22625 bytes

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