Malicious PDF — malware analysis report

Static analysis result for SHA-256 c001cb21967025ab…

MALICIOUS

PDF

81.4 KB Created: 2021-03-28 08:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f34a08901f9b07ee19971d22b9eb3f52 SHA-1: 83e1ed10d96890981cb858a3673a123e0753d63c SHA-256: c001cb21967025abf449f2494fdff0a01a851f20ec98c22140614ada9d52d7a5
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links to other PDF files hosted on various domains, many of which appear to be disposable. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://vilenefex.ru/wix?keyword=cardboard+relief+sculpture+lesson+plans PDF link annotation
    • https://zojufagilazit.weebly.com/uploads/1/3/0/9/130969654/368497.pdfIn PDF document text
    • http://normaa-id.com/how_to_get_voicemail_off_lg_flip_phonenjn4v.pdfIn PDF document text
    • https://pizotiwedif.weebly.com/uploads/1/3/4/8/134868845/4368992.pdfIn PDF document text
    • https://relujebaxarun.weebly.com/uploads/1/3/1/1/131164257/jokofazaribozomuwuz.pdfIn PDF document text
    • http://brightshopbg.xyz/que_es_propuesta_de_valor_brainlyy4t80.pdfIn PDF document text
    • https://biligimanud.weebly.com/uploads/1/3/1/4/131454089/1808458.pdfIn PDF document text
    • https://zunitilamurako.weebly.com/uploads/1/3/4/5/134529552/7698f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_605ef5842dcac.pdfIn PDF document text
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/ebe575f677992.pdfIn PDF document text
    • http://fbdirect.site/a_critical_survey_of_indian_philosophy_free_downloadrc8kt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_5ff2f08195090.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_604353d240c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_60286df63a3a4.pdfIn PDF document text
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/jazesenurudoz_bipabaj_makupokogumogi_tudiwi.pdfIn PDF document text
    • http://wonder-ita.fun/5183523932316tk3.pdfIn PDF document text
    • https://menedufigejit.weebly.com/uploads/1/3/1/4/131482930/7406331.pdfIn PDF document text
    • http://acupofjacob.com/37461143790oxl51.pdfIn PDF document text
    • https://jaduvobawitirok.weebly.com/uploads/1/3/4/3/134398576/3434041.pdfIn PDF document text
    • http://runolive.com/login_page_html_templatemnj3u.pdfIn PDF document text
    • https://buxiwizekekaxe.weebly.com/uploads/1/3/4/6/134662233/vuzomilikejaruvegan.pdfIn PDF document text
    • https://pazunorafozide.weebly.com/uploads/1/3/0/7/130776571/8b231a.pdfIn PDF document text
    • http://olivamebel.com/agence_d_interim_informatique_bordeaux095j0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48C 5196 bytes
SHA-256: a5d097b4d7f1ca395214102b921b3e1f1809fe39088834a997ec691266aed891
font_01_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 10536 bytes
SHA-256: a58b70be993f4760aec4525713d09ab2b3d1e3fe9ccdb2f3a96ef723564d4ab6
font_02_sfnt_off000129d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D6 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378