MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It employs SEO link farming and redirectors, specifically using the URL 'https://seumenha.ru/wix?keyword=systems+of+equations+substitution+worksheet+pdf' to lure victims with seemingly relevant document titles. The document also contains numerous other links, many pointing to S3 buckets, suggesting a broad distribution or content farm strategy. No scripts were extracted, but the PDF structure and heuristics strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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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Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINKPDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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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://seumenha.ru/wix?keyword=systems+of+equations+substitution+worksheet+pdf PDF link annotation
- https://muduzefob.weebly.com/uploads/1/3/4/0/134018051/ed883898d.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485576/normal_606109596aedf.pdfIn PDF document text
- https://cdn.sqhk.co/guxuboru/jaIhgNy/lizomujuw.pdfIn PDF document text
- https://cdn.sqhk.co/rifusofuwedi/hgzhghf/midsole_paint_pen.pdfIn PDF document text
- http://twoup-viktoria.online/super_multiplayer_soccer_2_4_player_local28vw5.pdfIn PDF document text
- https://cdn.sqhk.co/bejazerorod/hf35Cwm/liverpool_vs_arsenal_3-_1_highlights.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4476427/normal_5fd3a1ca59c57.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4384325/normal_5fc62ef9b1195.pdfIn PDF document text
- http://soldatskaya6.ru/is_salesforce_admin_job_easy3jo3c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4505699/normal_6035994483d3a.pdfIn PDF document text
- https://cdn.sqhk.co/sedazozesufu/eg9jage/1668685525.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4459937/normal_5fe925f802488.pdfIn PDF document text
- https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/3da0d51845f4981.pdfIn PDF document text
- https://cdn.sqhk.co/dezorevukor/gidSxhf/tabletop_simulator_steam_workshop_downloader.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382208/normal_600cdf1210441.pdfIn PDF document text
- https://lakowabanitewot.weebly.com/uploads/1/3/4/8/134898259/rezopulutodejarola.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/gafedupeba/cha_cha_cha_movie_song.pdfIn PDF document text
- https://s3.amazonaws.com/vitelitubovuluj/gefazenatudome.pdfIn PDF document text
- https://s3.amazonaws.com/fapaga/dell_precision_t5500_datasheet.pdfIn PDF document text
- https://s3.amazonaws.com/retobifulipo/advanced_physical_organic_chemistry.pdfIn PDF document text
- https://s3.amazonaws.com/novipaliwid/truck_driver_in_spanish_slang.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_off0000d8da.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD8DA | 5876 bytes |
SHA-256: 44b7d3b95ef92fd72d0fdda5de2f09136dfdc37ab00a89e9165225c138ccf465 |
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font_01_sfnt_off0000ecc4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xECC4 | 10412 bytes |
SHA-256: 6eb7bb2c58b2027705f41a68c4c082640ea41ba644e445d69b6206ea79dd9dc4 |
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