Malicious PDF — malware analysis report

Static analysis result for SHA-256 b11f3d2776217c10…

MALICIOUS

PDF

65.6 KB Created: 2020-05-30 12:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d14318f1080669e11f7726304c7e4a3 SHA-1: 9da58515ec14c869866ca9288836a14efd38fc72 SHA-256: b11f3d2776217c105f377152a21fff10cca143c49be58e3b2b3f3f628104be53
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, many of which point to domains that appear to be part of a link farm designed to host SEO-related content. The document body, though heavily obfuscated, contains text related to 'Minecraft forge api docs' and 'wkhtmltopdf', suggesting a lure to attract users interested in game development resources. The presence of multiple suspicious URLs and the PDF_SEO_LINK_FARM heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9543

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://northvanmucisacademy.com/uploads/1/3/1/4/131454692/131454692.html#minecraft+forge+api+docs
    • http://cvillehomeinspection.com/uploads/1/3/0/7/130739952/fadef.pdf
    • http://bscottage.com/uploads/1/3/1/3/131398405/naniravaxelija.pdf
    • http://northernlightsrescue.org/uploads/1/3/0/7/130740049/podoxurajitoluw.pdf
    • https://mcforge.readthedocs.org
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d04e.bin
a71cad8062076150bd830164b9717846b82592b968b0a212870e07d1f99951fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04E 12924 bytes

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