Malware Insights
The sample is a PDF file flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, one of which, 'https://leonvi.ru/aws?utm_term=words+of+wisdom+to+a+new+mother', is directly associated with a heuristic indicating a link farm on disposable hosting. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. No scripts were extracted, but the presence of external URIs and the overall malicious classification strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 5
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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 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://leonvi.ru/aws?utm_term=words+of+wisdom+to+a+new+mother PDF link annotation
- http://dietnatur.fun/android_studio_gradle_plugin_updatezlem3.pdfIn PDF document text
- http://gazagidumow.mygamesonline.org/95988046669.pdfIn PDF document text
- http://ses-paypal.com/katufojaroriragekitavev741x1.pdfIn PDF document text
- http://waranijovuv.sportsontheweb.net/uk_bribery_act_guidance.pdfIn PDF document text
- http://jukekelexoseda.22web.org/does_rainbow_still_make_vacuums.pdfIn PDF document text
- http://ragadugizidej.22web.org/64867755032.pdfIn PDF document text
- http://leaninrzpd.site/bane_chronicles_chapters4pewm.pdfIn PDF document text
- http://helpverifedbadges.com/best_english_grammar_book_free2bhux.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/fodose/android_studio_onclick_in_fragment.pdfIn PDF document text
- http://vegunag.rf.gd/rejokin.pdfIn PDF document text
- https://s3.amazonaws.com/zowejunef/46368796430.pdfIn PDF document text
- http://vonizevugopu.rf.gd/sikopamonajemuvotajizep.pdfIn PDF document text
- https://s3.amazonaws.com/netinuwa/google_analytics_reporting_api_javascript.pdfIn PDF document text
- http://duketududolur.rf.gd/92247136829.pdfIn PDF document text
- http://rusegidi.rf.gd/38631595854.pdfIn PDF document text
- http://deguwesipi.rf.gd/banting_breakfast_recipes.pdfIn PDF document text
- http://pavemamixazose.rf.gd/tiniwusevalimabanosap.pdfIn PDF document text
- http://sejofinudagiji.epizy.com/xunajinesexizewujilap.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_off0000eea1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEEA1 | 5220 bytes |
SHA-256: 2c31b51c6510b5378b625a463134966177f31067c6e4e9d72e36b4776966bc7d |
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font_01_sfnt_off0001004b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1004B | 10344 bytes |
SHA-256: d3e1c7534462073fed7d85805f3be194550af38e22c997e4c468a84b165fe8af |
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