PDF malware analysis — malicious · ea4cb8234be53508

MALICIOUS

PDF

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

MD5: e831204bf3afab29771aa99b8137e8fa SHA-1: eea8dac5c75bde6550510fc6fdb84e09f3ee9c0f SHA-256: ea4cb8234be53508de640e2c4d353829c02c193e302c597b13126866dcb3aa7a

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF was flagged by multiple heuristics as malicious, specifically noting the presence of risky executable scripts within an XFA form. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded file and script payloads suggest the PDF is designed to download and execute a second-stage payload.

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` `a92c49390d79e74dfb46f76de52544b8597467a97ea039fb9540e976405c5887`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3AB	1355 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6D7	199 bytes
`embedded_file_obj0012.bin` `950bc9f7c6d531cab5aeb260f95fe5a93cbea4e82b84599f90fd315bdf8531c5`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7C9	34238 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x428C	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4333	56 bytes

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