Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd267ebb1a2879e3…

MALICIOUS

PDF

29.4 KB Created: 2020-06-12 00:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa3c07ecc837458b48684578bb3cd508 SHA-1: 2fd7c7a9a4492b68152ff2619b51adcb6fb90307 SHA-256: bd267ebb1a2879e327cf149948732132e8378fd8346abb770046605910aed22b
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 are hosted on domains that appear to be part of a link farm designed for SEO manipulation. The document body, though partially corrupted, includes references to a 'Bowers and wilkins sound bar manual' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple unknown reputation URLs indicates a high likelihood of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://host197.carmichaelnl.com/uploads/1/3/1/4/131453464/131453464.html#bowers+and+wilkins+sound+bar+manual
    • http://geelong-concrete.com/uploads/1/3/1/3/131379394/gejamuj.pdf
    • http://danadadamo.com/uploads/1/3/1/4/131437728/3458410.pdf
    • http://mx.msmtax.com/uploads/1/3/0/2/130287984/ab42acc5.pdf
    • http://msjennispianostudio.com/uploads/1/3/1/1/131164032/2451158.pdf
    • https://tejizofuraxi.files.wordpress.com/2020/06/desitiliziliwesadenezo.pdf
    • https://lilozewu.files.wordpress.com/2020/06/53333539745.pdf
    • https://gidurum.files.wordpress.com/2020/06/37822194008.pdf
    • https://xexulovixuge.files.wordpress.com/2020/06/63603025020.pdf
    • https://pekidape.files.wordpress.com/2020/06/63049475630.pdf
    • https://zuvidujuf.files.wordpress.com/2020/06/dofomapufudetusop.pdf
    • https://kijijoniwe413232708.files.wordpress.com/2020/06/88593070003.pdf
    • https://gaxokebika.files.wordpress.com/2020/06/82252277383.pdf
    • https://volutabeni.files.wordpress.com/2020/06/36789855310.pdf
    • https://jafujanile.files.wordpress.com/2020/06/guvularoregog.pdf
    • 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_off00004bbf.bin
a0bcff8131d72ef4e3c57a6a632bf17af27fd12b9fa089d4886efd74fbdd7ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBF 8996 bytes

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