MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, with heuristics indicating a link farm hosted on disposable domains. One of the primary URLs observed is 'https://pelibirfir.ru/strik?utm_term=eat+for+health+book+2', which is likely part of a phishing or malware distribution scheme. The PDF structure and the presence of numerous external links suggest an attempt to lure users to malicious content, aligning with spearphishing tactics.
Machine Learning
- Nyx PDF Classifier malicious score 0.9961
Heuristics 6
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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 contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall 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.
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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://pelibifir.ru/strik?utm_term=eat+for+health+book+2 PDF link annotation
- https://cdn.sqhk.co/vobevufubito/hbFgajf/oneplus_6t_home_button_not_working.pdfIn PDF document text
- https://cdn.sqhk.co/bowawugafux/oWBgiuo/crossy_road_secret_characters_party.pdfIn PDF document text
- https://cdn.sqhk.co/letiludixo/hbsmidx/angular_formarray_change_value.pdfIn PDF document text
- https://razebefalokugex.weebly.com/uploads/1/3/4/8/134895215/jexun_wowefexanu_kirelamifo_bukoxegam.pdfIn PDF document text
- https://vutofuwejazow.weebly.com/uploads/1/3/4/3/134321520/zapelemod-bonimevalib.pdfIn PDF document text
- https://cdn.sqhk.co/duwenaxiseve/Jijific/tomigiwuxijasorisatopu.pdfIn PDF document text
- https://gidapozu.weebly.com/uploads/1/3/1/3/131379371/pidepozopigar.pdfIn PDF document text
- https://ronojunigamedez.weebly.com/uploads/1/3/5/2/135297775/kakeri.pdfIn PDF document text
- https://cdn.sqhk.co/jigitovewuk/jbAhaa2/vorezanuvokowapiligez.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_275380c470dd489db419c0ae280053dd.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/f004ea12-bbda-4423-bfb8-64fdae5f600b/the_every_other_day_diet_plan.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5916ced0-4015-4eb1-8d6f-c6d5d1f26523/2654486741.pdfIn PDF document text
- https://de74b992-0de1-402f-a2cc-438209b178b2.filesusr.com/ugd/2693ef_7296a787a39f41a98c27b78f7eba3a6d.pdf?index=trueIn PDF document text
- https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_209a6abdc0474b0ab59bc258ec8848a7.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/64f6b326-45f0-4568-b349-86f8704a1e01/radilidixobo.pdfIn PDF document text
- https://780c8f77-0f51-49ab-8dd1-60a90eb210a4.filesusr.com/ugd/1b8612_5e2bf785c8014820b6920618f7b1ca04.pdf?index=trueIn PDF document text
- https://32cf4326-ba62-484c-a3ca-05d02c2dd2e5.filesusr.com/ugd/0b46e6_8e6a4a2ef18045f9a15f795a79e9209c.pdf?index=trueIn PDF document text
- https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_757cfa7df8314eeba8fa15e05f4cd557.pdf?index=trueIn PDF document text
- https://a82c121c-2200-4cd7-aff6-47cf910fdadb.filesusr.com/ugd/117c17_50b2e75222e04eb991e503035cf0eb4d.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0c63d5b6-3cc6-4cef-bb37-daa9adeda77f/present_simple_exercises_with_answers_doc.pdfIn PDF document text
- https://f7690f66-1871-4559-97e0-239dee5b15da.filesusr.com/ugd/d2cc1f_07810733dfae47648eb405cd00e046c1.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/2942e687-a4c5-4a73-9260-d6192a1901e0/will_there_be_another_diary_of_a_wimpy_kid_movie_in_2020.pdfIn PDF document text
- https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_bc472d32b2da42658b524cac2cf95295.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/9dc526a3-3a17-4b61-a730-b75e4bc63761/what_are_the_different_genres_of_films.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7e84817a-cf69-48d4-aac4-5dfb205dc0ca/flotec_2_hp_sprinkler_pump_parts.pdfIn PDF document text
- https://7ffe38df-ef78-47a1-8632-a9c579db478a.filesusr.com/ugd/8ff694_c4fc93da2bb44e6186f3ed4bc72954a2.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/b1114b84-7ca0-471d-9754-93847ae6689d/vidusiji.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6598c80c-4dce-44d2-a1cf-f5413f0f4bda/nixabu.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_off00013666.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13666 | 4972 bytes |
SHA-256: bab067e5561dc71ee6e9c16af43f4de7975073b6c8a379421f64b6bbf82df2d7 |
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font_01_sfnt_off00014753.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14753 | 10996 bytes |
SHA-256: a7fbd52b59e14f7a0ede29b9b35effbb7d352ecc4ef6cca3747b4ef7e2e50082 |
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