Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7e5b19abf7a18fa…

MALICIOUS

PDF

56.0 KB Created: 2009-07-11 08:11:56 Authoring application: Scribus 1.3.3.13 (via Scribus PDF Library 1.3.3.13)
MD5: 0883aec7b6eb8f9556ba783c1c82bfb4 SHA-1: 1b74988572741297ead4aed95d7a5365d9cc9372 SHA-256: f7e5b19abf7a18fabe8d6f1c764f580b33caddd88e3f7b434f1407af148f7506
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier and ClamAV with a critical severity, indicating malicious content. Heuristics indicate the presence of embedded JavaScript, which is often used to download and execute further stages of malware. The document body is image-based, suggesting a lure to entice users to interact with the malicious JavaScript. The embedded JavaScript streams are likely responsible for the malicious behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0034_000.js
8508689dc458115927ee2337d9db45db65c3fa34bbd24ce40c43ac45fa733f17		 pdf-javascript-stream PDF /JS object 34 at offset 0xAFBD 44104 bytes
javascript_obj0035_001.js
270a3ecc6b9f9e2689d9c4856b4a1478c6a6309b197df11eb99719f0ee71b7e4		 pdf-javascript-stream PDF /JS object 35 at offset 0xD880 298 bytes
javascript_obj0036_002.js
8922f6d1949dfff5e4554919a22a9dcf94eae8ca23a00b4e3795cc0b92bee202		 pdf-javascript-stream PDF /JS object 36 at offset 0xD9B3 227 bytes

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