Malicious PDF — malware analysis report

Static analysis result for SHA-256 9711846a887608ce…

MALICIOUS

PDF

97.0 KB Created: 2021-04-08 17:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ccd7eedd9741b6d69dea6d95bb6546d9 SHA-1: 814c072fe50701785ebc638c77d34f2946ada55f SHA-256: 9711846a887608ce5ae3f771d4e50b27385a6e157c74c777cd52faeb5b6a5692
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users to potentially malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_UTM_REDIRECTOR_LINK indicate a phishing lure, likely attempting to trick users into downloading further malware or providing sensitive information. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://kuzutuzo.ru/strik?utm_term=is+toro+a+good+brand+of+zero+turn+mower PDF link annotation
    • https://pokotozumunas.weebly.com/uploads/1/3/1/4/131453498/62c3949.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/jeWLjbB/62873508164.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/1580800.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/jfHShjP/14125394595.pdfIn PDF document text
    • http://fineagencyy.com/what_was_operation_iraqi_freedom3b6bg.pdfIn PDF document text
    • https://cdn.sqhk.co/jafiwimeg/WsherrD/chicken_crossing_the_road_jokes_dirty.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/jd3giBA/texas_longhorns_softball_score_today.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/z3hbigX/wemop.pdfIn PDF document text
    • http://trendmobile.ru/7820832671oz1ja.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/qCyRcJP/fdic_call_report_glossary.pdfIn PDF document text
    • http://tryraisins.pro/gawepijaxotuselalamw1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/cadde69f-b382-493b-bfd8-e5ee97a559c4/highway_capacity_manual_level_of_service_definitions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a183714-b8ab-42d2-9ffe-6a6e21a1fd7b/biblia_de_estudio_plenitud_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8140be2d-eccf-4096-b689-509157eed2ac/how_to_use_shark_pro_steam_pocket_mop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c8b3f2-3e6f-4c9f-b2ba-bffc02b89f21/66414007620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0303493b-f9fe-4991-80c4-96138dd35cd7/tokorezowukil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866df70c-6e5f-43a6-b8c3-5abd6c51f261/32818316405.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0fce8db-5f23-4f9c-9eb8-abe5cb714846/what_is_lady_macbeths_purpose_in_the_play.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A42 5416 bytes
SHA-256: c7918d39a7b5e836dc18b416437e0c3cb0ec08af3e337d5b47f561b003c1e3af
font_01_sfnt_off00013cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAE 10876 bytes
SHA-256: 16c6af11f6680ecdea1e74f6fdde0fe009227bab08f64278102ccc04eb0da9b6
font_02_sfnt_off000161ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161EC 16076 bytes
SHA-256: c26df5a654703d82c4b49e3d99d7624c72720c83e2144c41d2616ef18af3c653