Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f124da720fa3e6a…

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: f0fa23ccee94c211023661981a57f250 SHA-1: 1eb304ae0068245c14e0077a24f77fda588fd5af SHA-256: 1f124da720fa3e6a3cdceba03e6c7ad3d6f9d259c0698cd00c3af580c5b968b4
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript streams, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of JavaScript actions and streams points to the execution of malicious code, likely to download and execute a second-stage payload. The document body is image-based, a common lure technique.

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
483a0d148c799f4b74617214c1c84c6bf7ae8855303e1cda58b57549ce1c538a		 pdf-javascript-stream PDF /JS object 34 at offset 0xAFBD 44686 bytes
javascript_obj0035_001.js
7f851654335ac5ab106118940cc65e053482df74de52399e24507b0a8b586e3c		 pdf-javascript-stream PDF /JS object 35 at offset 0xD8BE 279 bytes
javascript_obj0036_002.js
5dab933088244bc318babac675380b08f0818faeba740f28019ac2006975c198		 pdf-javascript-stream PDF /JS object 36 at offset 0xD9E2 242 bytes

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