Malicious PDF — malware analysis report

Static analysis result for SHA-256 131ffbd05d77af1c…

MALICIOUS

PDF

3.4 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: 885a1c8ae22ff4c652d025ce88f7454c SHA-1: f3d7a2c387558a6263e442afdc48efdd3000456c SHA-256: 131ffbd05d77af1c1394f432a25d58a6a63504e02713083286715833ca02ee03
192 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF document that leverages a known exploit (CVE-2010-0188) targeting Adobe Reader's handling of XFA forms and TIFF images. Embedded JavaScript and XFA form elements are present, indicating an attempt to execute malicious code upon opening. The ML classifier strongly suggests malicious intent, likely to achieve arbitrary code execution.

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
c1e264dd3431f9ca5f2d86b59e39b6d679cb037f53fbefe4897270aefc0ec74a		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes

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