MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It functions as a link farm, containing numerous external links to other PDF documents, a common tactic for SEO manipulation or distributing further malicious content. The primary URL observed is vilenefex.ru, which is likely part of the distribution infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://vilenefex.ru/strik?utm_term=what+are+one+view+drawings+used+for PDF link annotation
- https://static.s123-cdn-static.com/uploads/4419818/normal_5fe1a52621440.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446765/normal_605654a11dd97.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484807/normal_60498a1f34874.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4453333/normal_5fcd9dc12ae74.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413983/normal_603d8d7e4ae86.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446388/normal_605c08827ec2b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4473340/normal_6017ab188aafe.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4448137/normal_5ffea5e3b2733.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
- https://s3.amazonaws.com/fidobakipivogit/fojedotodemiremo.pdfIn PDF document text
- https://f78a7b13-e75c-4ddc-9f3c-03cd83736f6c.filesusr.com/ugd/90c53f_3be3ad6637bb4fed9b5e08adbcf7da3d.pdf?index=trueIn PDF document text
- https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_99f6568870a14411905c1f9247783d1c.pdf?index=trueIn PDF document text
- https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_b3ce75b16d034f1d9c02882440a6fa89.pdf?index=trueIn PDF document text
- https://d45380bd-a93d-4ef2-b2bd-4c7806d1f6db.filesusr.com/ugd/5d2cf3_c7f5f26411c84495972ed5249560b1e2.pdf?index=trueIn PDF document text
- https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_cf543103380b49ac82c349ec46cfc5c4.pdf?index=trueIn PDF document text
- https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_b2bdcea42d4f4beaad05d890024c2ed7.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/varolexexus/android_cardview_example.pdfIn PDF document text
- https://70745723-7f4a-4dc7-98be-95bdce43cd82.filesusr.com/ugd/67bae7_f1b614f368fe41c8981d07301b1e5da1.pdf?index=trueIn PDF document text
- https://c01188fd-d8af-4b86-846b-090f7ecd58d8.filesusr.com/ugd/9058e5_2ff99ad09bb64187961b9d6b0e28fb2d.pdf?index=trueIn 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.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e91c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE91C | 5184 bytes |
SHA-256: 6c274252d131c4c8952b614ff55202d25676834641bac1a880dc247f826b331d |
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font_01_sfnt_off0000fad9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFAD9 | 11164 bytes |
SHA-256: 70a9bbdaf10a8bd331d3cf0f400a18afce26284b4d4cf3b817902bb65c3ba37d |
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font_02_sfnt_off000120dc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x120DC | 4324 bytes |
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378 |
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