PDF malware analysis — malicious · cbb6c2267a591c91

MALICIOUS

PDF

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

MD5: 99a0f84a75b3dc49cf9ad8fb20b27d25 SHA-1: 600fc4a125a99ef0bb9f8332aabf0633f0fe908e SHA-256: cbb6c2267a591c910f8547326da1c3b2821c47c080fe3feb725f796cf35ba0a4

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains embedded scripts and is flagged by multiple heuristics, including PDF_XFA_SCRIPT and ML_NYX_PDF_MALICIOUS, indicating it is designed to exploit vulnerabilities. ClamAV detection as Pdf.Exploit.Dropped-81 further confirms its malicious nature. The embedded script likely serves to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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 0x1E5	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x294	228 bytes
`embedded_file_obj0010.bin` `f8518da8d98c4da79e6612a772347ea4abfdddc4f7c6c34902f117e52fb3ec4e`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x387	1268 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x694	199 bytes
`embedded_file_obj0012.bin` `2f44560607ef600621d951a59c3f9d71eb1510246aeb86bb25251a63037713e4`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x786	34113 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4227	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x42CE	56 bytes

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