PDF malware analysis — malicious · 07ef780b8208d4dc

MALICIOUS

PDF

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

MD5: 2301ee762b0a4c663ed7f6e766060318 SHA-1: 825a9867175d7c59d9003166e5988727e47720e1 SHA-256: 07ef780b8208d4dcd8844f7b35b3bc084ea9b99bf1fd7ce5c50fb04004d17206

198 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains high-severity heuristics indicating it is an exploit targeting PDF vulnerabilities, specifically XFA forms with executable scripts. It also embeds multiple files, one of which is significantly larger than the others and flagged as a suspicious artifact, likely containing the secondary payload. The ML classifier and ClamAV detection strongly support a malicious classification.

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 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 script payload in PDF stream low 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.
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` `e7347b7838093b844229dfc0f0f8cf15ed872c81bb1e7ae48709629d65b38a57`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x542	26939 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 0x6EC8	323 bytes
`embedded_file_obj0014.bin` `09422b3951a8ed3fa47161645ad8df159ad259b32d97aa07ee63ecd7803582aa`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x7055	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 0x713F	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x71D3	56 bytes

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