PDF malware analysis — malicious · 4a4ae84a468c0222

MALICIOUS

PDF

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

MD5: b367280a1c602fdc1d7ee2f7547b4c76 SHA-1: 69634b47d5e501f0539b1476cd768bd35cac4edf SHA-256: 4a4ae84a468c0222cbed62164d2b7f0a9aa10a5051167e659ec933e7d30d0429

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple high-severity heuristic firings related to embedded scripts and XFA forms, indicating an exploit attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded files and the 'Pdf.Exploit.Dropped-81' signature point towards a dropper mechanism designed to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xDB	67 bytes
`embedded_file_obj0009.bin` `38c81935ce11af5f7ac843faedee50e3f72f9fb62219a5761db7ba2d82e88742`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x167	65 bytes
`embedded_file_obj0010.bin` `cf0affc2e1012ec6c2cce6f06a8929d8c7111d72109cae6df644366f8fe1707e`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1F3	772 bytes
`embedded_file_obj0011.bin` `bf611ffc81e85d2cac2b4071aac73a147ae401cc0a8815e1e2be028a9f95fe3d`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x542	26889 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0012.bin` `103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x6E96	323 bytes
`embedded_file_obj0014.bin` `09422b3951a8ed3fa47161645ad8df159ad259b32d97aa07ee63ecd7803582aa`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x7023	164 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x710D	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x71A1	56 bytes

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