Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a765d1e783cfe18…

MALICIOUS

PDF

3.3 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: 8edcdf57cb5f7f0c3bbf20c8b948fa6b SHA-1: 5c2ee9f4a41e99ebb45b5c1793b91ed4f2eed99e SHA-256: 7a765d1e783cfe18b79d30300311d77f89f0564e34379d19f2e935c116f66cd2
192 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF sample contains embedded JavaScript and triggers a critical heuristic for PDF JavaScript exploit clusters, specifically identifying the CVE-2010-0188 exploit for Adobe Reader's LibTIFF XFA image handling. This indicates the file is designed to exploit this vulnerability to gain initial code execution, likely as part of a spearphishing attachment campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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-data/1.0/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0004.bin
a14c79c9e0cb8bffaa7aa045a439f47c8f45109d78b94f3a19361db94dfeaaee		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes

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