MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains multiple external URIs, including one pointing to 'kuzutuzo.ru' with a keyword suggesting a worksheet. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
Heuristics 5
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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/wix?keyword=isotope+symbol+worksheet+answer+key PDF link annotation
- http://vovpomnim.ru/programma_free_per_scrivere_su_fileribvz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370987/normal_603e5057941a9.pdfIn PDF document text
- http://biweekamnf.com/2016_elantra_gt8av6w.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484356/normal_5fea094b78df0.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489429/normal_603068c11bc8d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4367277/normal_6006fe86d35da.pdfIn PDF document text
- http://devedilazabu.medianewsonline.com/kawomewivefiserijiloper.pdfIn PDF document text
- http://libopadu.scienceontheweb.net/difopuko.pdfIn PDF document text
- http://tufofol.medianewsonline.com/likapu.pdfIn PDF document text
- http://kellys.space/35408692189kwm1p.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4418970/normal_603b1f418525c.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/visagogijulep/sepopugaxajedubunefitarew.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b961d72a-3d40-43a9-881b-8c1e80d9fb61/vewivolidovulukubu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/494827e6-ccc5-4485-97d3-b4ccf8ec1c94/pulubusakosemagi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/57a0dcfe-cbfc-4a84-bd6a-9d7d3a74a9b9/which_function_has_vertical_asymptotes.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f1b86a03-24b8-4ad5-89c3-752a57679689/what_are_the_strengths_and_weaknesses_of_a_research_study.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea3cd281-6127-4986-8e5c-a306efbb3663/how_to_open_big_green_egg_charcoal.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/31e45b0c-ce73-4823-a5e3-e52ec3c735cb/ai_vs_machine_learning_vs_deep_learning_quora.pdfIn PDF document text
- https://s3.amazonaws.com/gateme/51614341244.pdfIn PDF document text
- https://s3.amazonaws.com/fosagoba/software_development_systems_life_cycle_methodologies.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/002095c2-64ee-465f-a40e-6327dff10097/jixasijini.pdfIn PDF document text
- https://s3.amazonaws.com/latufenaw/how_to_set_up_the_deluxe_ez_bow_maker.pdfIn PDF document text
- https://s3.amazonaws.com/nasitevu/nerebuteruvazujunuletu.pdfIn PDF document text
- http://xemigososefof.atwebpages.com/inhibition_of_enzyme_action.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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00010cd9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10CD9 | 5392 bytes |
SHA-256: 1090192de8fed9893899de783596740483d3e3768c43c26b584923ab24327a75 |
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font_01_sfnt_off00011f15.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11F15 | 10556 bytes |
SHA-256: 354847b56a1ac681aa2a74c3f6f4465d8554da543cb46f51f860b6785bc8ea3a |
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