PDF malware analysis — malicious · 8d851f1e6d3641f2

MALICIOUS

PDF

17.8 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: 039a3f01f529fd7a333cc280fc1d4e4e SHA-1: 2dc864c36464319565c44a52f9a77e920e846548 SHA-256: 8d851f1e6d3641f272bdd21cf7e86166293ff886367a6d5747bb3cdbbb227cfe

166 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 T1071 Application Layer Protocol

The PDF file contains embedded scripts and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The presence of XFA forms with executable scripts indicates an attempt to exploit vulnerabilities within the PDF reader. The ClamAV detection 'Pdf.Exploit.Dropped-81' suggests it's a known dropper for further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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.

Filename	Kind	Source	Size
`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` `0283af2ebcec867407f9c053f0b00b9c1f23230894bd08ecdb8e775d4309a900`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3AB	1367 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6E3	199 bytes
`embedded_file_obj0012.bin` `a51f8238e794e75a3c72de882ce57faff6ae62522f1e08bbafe1e7d1a8715b63`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7D5	34260 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x427D	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4324	56 bytes

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