PDF malware analysis — malicious · 3a4f66c3cbc479fd

MALICIOUS

PDF

14.6 KB Created: 2010-08-29 16:19:36 Authoring application: XgaRolyf HhEkygafajinycyde

MD5: a97d1aa3f36bfff9d55f9aa92692cfbd SHA-1: 47975271c1adc02cad7fe89da14536aa07132372 SHA-256: 3a4f66c3cbc479fd83f66b9e586d2623594fd16dd0e4a6637c79be9411d38a82

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter

The PDF was flagged by multiple heuristics as malicious, specifically noting the presence of risky executable script within an XFA form. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded script is likely responsible for downloading and executing a second-stage payload, a common technique for PDF-based malware delivery.

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 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
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/

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 0x19E	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x24D	228 bytes
`embedded_file_obj0010.bin` `443f5b1a1087393f60100656af7796f2b9e7ebc0794328ef9f9372a6bb05b758`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x340	1628 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6D1	199 bytes
`embedded_file_obj0012.bin` `51692012840059a4b9f80f3322fb5973698a870c9a64a5a9fc4d4d473f62c52a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7C3	29225 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x3557	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x35FE	56 bytes

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