Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63bc77c5cc9c8b5…

MALICIOUS

PDF

109.7 KB Created: 2020-11-18 03:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79534c71de4e1d65a7d39cc5194a7fb3 SHA-1: d7e2d8d6a1c31b88d918dc21b9d56655bcb12921 SHA-256: b63bc77c5cc9c8b54b6126918afae61b351c9f75d4b6616d7c658bcbca91c579
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URL and the document body mentioning 'Kevin Trudeau books' are likely lures to direct users to these external resources, which may host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://trafftec.ru/123?utm_term=kevin+trudeau+books
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/292e5a3c.pdf
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f969b9b754a7.pdf
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/5483434.pdf
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/3cab33ef621d453.pdf
    • https://dakovogusuzulex.weebly.com/uploads/1/3/4/5/134595229/6422274.pdf
    • https://cdn-cms.f-static.net/uploads/4465545/normal_5fa9a550b8235.pdf
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/88b22695ee0.pdf
    • https://xovatikawe.weebly.com/uploads/1/3/4/7/134726086/musutixitavik_ganiwe_kanuraza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wonoti/35759417578.pdf
    • https://uploads.strikinglycdn.com/files/64230e4b-6471-4f71-84a4-3404270f533a/acrostico_con_el_nombre_de_lizbeth.pdf
    • https://s3.amazonaws.com/wixamupelinere/schengen_visa_italy.pdf
    • https://uploads.strikinglycdn.com/files/228283a0-ee51-4887-a6e9-2ddf766b2cce/liz_seven_deadly_sins.pdf
    • https://s3.amazonaws.com/luramamelolem/the_passage_trilogy_vk.pdf
    • https://uploads.strikinglycdn.com/files/6686c98a-d3ce-468a-867a-f487722a685e/93178853142.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e52.bin
745522e44e38443cc4f9b75d6022ba25f7f6b96189a32d1ced1a8ccf4aabbd4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16E52 5020 bytes
font_01_sfnt_off00017f75.bin
385d9360328bc1e8e87ad74da25b8e4e3d1dae05d0e46e02b72aab2d6ba3e800		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17F75 12004 bytes

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