Malicious PDF — malware analysis report

Static analysis result for SHA-256 6518861667e4dd3e…

MALICIOUS

PDF

62.4 KB Created: 2021-02-24 22:04:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6b7331e3fe3860a78aab7e679cfbf264 SHA-1: 0a80efbb774d31bfd098f6d564dbad30a460f88e SHA-256: 6518861667e4dd3ec865972fc48583f2802279bf8a0213e63c9712f1cc423dd4
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, https://leonvi.ru/strik?utm_term=how+to+use+bluetooth+on+polk+soundbar, appears to be a redirector. The document body is heavily obfuscated and unreadable, but the presence of numerous external links indicates an attempt to direct the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://leonvi.ru/strik?utm_term=how+to+use+bluetooth+on+polk+soundbar PDF link annotation
    • https://bododomeliba.weebly.com/uploads/1/3/1/4/131408614/vilapo.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/rabanuguxufel.pdfIn PDF document text
    • https://filukekab.weebly.com/uploads/1/3/4/4/134478490/0abede85f.pdfIn PDF document text
    • https://silepokow.weebly.com/uploads/1/3/4/3/134366863/9419302.pdfIn PDF document text
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/vimusilimorudi-ruborotabudi.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/22585089631.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/business_management_degree_online_uk.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/jatuwikumufun.pdfIn PDF document text
    • https://zukutalemuz.weebly.com/uploads/1/3/4/5/134582669/poliji-dipezijixe.pdfIn PDF document text
    • https://zubisixoligifi.weebly.com/uploads/1/3/4/4/134479514/vuwev.pdfIn PDF document text
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/4031347.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gosaduzunake.myartsonline.com/81137468570.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC10 5304 bytes
SHA-256: 5f38a91a51a602977aa07c76be19fb7c4c03c02ee20680d899241dfabfbbda60
font_01_sfnt_off0000ce13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE13 9060 bytes
SHA-256: 3688612ddba1d113488991ca4335ce1e96e4d3ba89521b22c489799e30458b33

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