MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file contains a large number of external links, many pointing to disposable hosting, and is detected as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, appears to be a lure for downloading a PDF related to 'conceptual physics', which is likely a pretext to disguise the malicious link farm. The primary attack pattern involves directing users to external sites through a deceptive link farm.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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://jacksth.ru/wix?keyword=conceptual+physics+11th+edition+paul+g.+hewitt+pdf+free+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4494668/normal_5fd6490179be6.pdfIn PDF document text
- https://cdn.sqhk.co/wibetaxor/zxOciix/jugar_flight_simulator_c130_training.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4480893/normal_6037e3147ec6d.pdfIn PDF document text
- http://jaralet.getenjoyment.net/toyota_camry_se_2018_tires.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4466391/normal_602ad051ae845.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4387031/normal_5ff9d26825eff.pdfIn PDF document text
- https://cdn.sqhk.co/turanexode/jdieIid/photo_collage_maker_for_facebook.pdfIn PDF document text
- https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/9079339.pdfIn PDF document text
- https://cdn.sqhk.co/letinumi/ihchbx3/dinosaur_vs_aliens.pdfIn PDF document text
- http://wewogokuwidu.mywebcommunity.org/rebizu.pdfIn PDF document text
- https://cdn.sqhk.co/vudupapuj/djPwr3V/bejixepajop.pdfIn PDF document text
- https://cdn.sqhk.co/fifenije/hciiKT1/vivo_smartphone_civil_war.pdfIn PDF document text
- http://zipubezexupoka.mywebcommunity.org/75709915487.pdfIn PDF document text
- https://cdn.sqhk.co/juwafajem/mJPghjg/sanugar.pdfIn PDF document text
- https://cdn.sqhk.co/vasozaponem/hdehjjb/lenovo_ideapad_320_amd_a12.pdfIn PDF document text
- https://xekawipafamut.weebly.com/uploads/1/3/4/3/134328312/7c7ec694addb5.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/90ab6944-2c43-4911-8989-d0ede35235b1/27446457088.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/1b9659b7-9ec8-4834-92c9-893f74b8810b/fedobarodiduruseguxagog.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d2841814-75c6-4b9e-84e6-7763f70c0d80/zeworejanatovaxomek.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_off0000e4ea.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4EA | 5600 bytes |
SHA-256: 24fafb0650e3be78fcbe12105556d2b69b7c509777df204e390ad446a9d8b968 |
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font_01_sfnt_off0000f812.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF812 | 11952 bytes |
SHA-256: 7ec6a44aff489e6e870aecb4e1d8ff9206236b1f68364f3e2eab0eae690957b7 |
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