PDF malware analysis — malicious · 8dc73d2dbac08376

MALICIOUS

PDF

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

MD5: 5bd64e3753f1a786247b348db8ad1ae9 SHA-1: 8688c433da4f05dd800fd81dceb0488de5ac4c4a SHA-256: 8dc73d2dbac08376bc449db2459c0a507927d0690f4dce005e59d358dccb3a94

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple high and critical severity heuristic firings related to embedded scripts and XFA forms, indicating an exploit attempt. The ClamAV detection 'Pdf.Exploit.Dropped-81' further confirms its malicious nature. The presence of embedded files, specifically 'embedded_file_obj0011.bin' and 'embedded_file_obj0014.bin', suggests these are likely payloads or components of the exploit. The PDF_EVAL and PDF_XFA_SCRIPT firings point to the execution of potentially malicious JavaScript within the document.

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` `97e1cd58a1e88779c2a9e0db7c49701a256fe3283dc287cf0f1175c1ccdfbdeb`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1F3	772 bytes
`embedded_file_obj0011.bin` `1f6dc7edeee89b0e54f2b4db57b51f2fc7392a2efa464e1719edaad21290e090`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x542	27207 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 0x6FD4	323 bytes
`embedded_file_obj0014.bin` `09422b3951a8ed3fa47161645ad8df159ad259b32d97aa07ee63ecd7803582aa`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x7161	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 0x724B	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x72DF	56 bytes

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