Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c591ae654f8c671…

MALICIOUS

PDF

79.8 KB Created: 2021-02-27 09:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9792de8a81307c32c9f0ded69d2b69c3 SHA-1: 79e90897f46dc52b3cb30afad2515db71448935f SHA-256: 0c591ae654f8c671bf8d178b5dc7163258dc474136a50974db07c7c04fa84a14
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jumiwimov.ru/123?utm_term=whirlpool+fridge+freezer+parts+diagram PDF link annotation
    • https://cdn.sqhk.co/bidamasegom/Shhbhid/melody_definition_example.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/WUkmtjN/1775_rebellion_vs_878_vikings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489993/normal_5fe86203f1660.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469641/normal_5fe00c2c5d454.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/jcfgdie/master_car_climb_racing_mod_apk.pdfIn PDF document text
    • https://jizesemud.weebly.com/uploads/1/3/2/7/132710762/lebidifepugamu.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/FSjhrge/88469203201.pdfIn PDF document text
    • https://safesawugu.weebly.com/uploads/1/3/2/8/132814337/rejekizojej_bapajeriji.pdfIn PDF document text
    • http://youralteragoods.com/murray_riding_mower_parts_near_meneww8.pdfIn PDF document text
    • http://stebsmeh.space/24682761609f93my.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449789/normal_5fff2b67e629c.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/momuwerow.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/cours_orthographe_francais_gratuitnod4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481286/normal_602beea4b26a8.pdfIn PDF document text
    • https://veriketosamu.weebly.com/uploads/1/3/4/6/134675732/6455711.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/7764b4d10f56c33.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lasesesavobopom.rf.gd/2019_calendar_excel_template_uk.pdfIn PDF document text
    • http://mefexatireriva.rf.gd/assistive_touch_apk_for_iphone.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 5516 bytes
SHA-256: 6f2a6f2ff3b0ba6d8ecad6f97826b1962f77bed888020afe7cf87a282aca3bcd
font_01_sfnt_off00010dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD9 10404 bytes
SHA-256: a50b91a20ca1bc4d65988e22aba309cb9687bf1c9c3c2b570f139914216c7b62

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