MALICIOUS
206
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded URLs, many of which point to disposable hosting and appear to be part of a link farm. One notable URL is https://vilenefex.ru/wix?keyword=montana+youth+challenge, which is likely a lure. The malformed stream length heuristic suggests an attempt to hide malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 7
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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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Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTHA PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
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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/wix?keyword=montana+youth+challenge PDF link annotation
- https://s3.amazonaws.com/fukepez/blade_and_soul_guide_for_beginners_2018.pdfIn PDF document text
- http://duwudivusupo.mygamesonline.org/what_is_an_example_of_a_body_paragraph.pdfIn PDF document text
- http://boforotaje.mywebcommunity.org/sql_query_interview_questions_and_answers_for_experienced_download.pdfIn PDF document text
- http://majikok.mygamesonline.org/how_to_answer_summary_questions_in_wassce.pdfIn PDF document text
- https://sagagokibifaku.weebly.com/uploads/1/3/4/6/134625973/xifuwenugobojetexu.pdfIn PDF document text
- http://zitupow.medianewsonline.com/business_information_system_free_download.pdfIn PDF document text
- http://loduwij.scienceontheweb.net/54746274149.pdfIn PDF document text
- https://fenutirixe.weebly.com/uploads/1/3/4/6/134640366/414980.pdfIn PDF document text
- http://zitalogeloluwiw.mygamesonline.org/bopetiseg.pdfIn PDF document text
- http://tafakiduwav.scienceontheweb.net/jujabomopupakedilaso.pdfIn PDF document text
- https://s3.amazonaws.com/serogajugomiji/netflix_family_plan_limit.pdfIn PDF document text
- https://s3.amazonaws.com/wewuxuviwar/boca_raton_police_department_accident_reports.pdfIn PDF document text
- http://kozidozilujivox.getenjoyment.net/what_is_the_theme_of_once_more_to_the_lake.pdfIn PDF document text
- https://motazejiwe.weebly.com/uploads/1/3/4/2/134266269/1b355896c4f.pdfIn PDF document text
- https://s3.amazonaws.com/jebokizez/zixenun.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/3b43652d-5c48-46d4-bb00-c1991644a09f/how_much_should_a_miniature_dachshund_eat.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4cc850d1-c542-46ad-8673-a27ca2d50bed/how_to_use_dyson_ball_multi_floor_2_attachments.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/4475d711-dc54-4141-88f7-78238191a31f/cuanto_es_1_8_inch_en_centimetros.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/420d7aa1-1cb6-48b1-a42b-cd5848d04a70/what_state_has_the_highest_prison_population.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aab4c3e5-fde1-455e-8290-e119765ca5bd/bakudijab.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c41b6fd6-7d3e-4b78-a03f-8ce986f731c3/77164681262.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43afb2b7-4ea0-47a9-a619-819811a17c21/2488186132.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_off0000f0e3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF0E3 | 4896 bytes |
SHA-256: 1a96d3aed461eacd4c87b2f286bfc6eed6345ee1b9ba162c6faf5409dccfc802 |
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font_01_sfnt_off000101a4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x101A4 | 11704 bytes |
SHA-256: e651d38f90859d2e91e3324448147d30e00dd4aca5681c214c90b46d65f973d3 |
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