MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm for SEO manipulation or malicious redirection. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. The presence of embedded JavaScript suggests potential for further exploitation or redirection.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 6
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://chcial.ru/uplcv?utm_term=english+placement+test+sample+pdf PDF link annotation
- https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/67483703508.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161378241e1e41---sizarasudidewan.pdfIn PDF document text
- http://creativecoms.net/userfiles/file/gifowelivunudizavaxoguxid.pdfIn PDF document text
- http://pes.edu.mn/ckfinder/userfiles/files/gudulu.pdfIn PDF document text
- https://rotterdampools.com/contents/files/kanoseka.pdfIn PDF document text
- http://eapver.com/upload/ckimg/files/202109251652565155.pdfIn PDF document text
- https://vocembalo.ch/userfiles/file/tajineboxuwafijavurij.pdfIn PDF document text
- https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a3b9d28b41---36768711756.pdfIn PDF document text
- http://viviapalermo.com/userfiles/files/kinukufodanonuzedopujej.pdfIn PDF document text
- http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xidarakabuzosos.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210912030038.pdfIn PDF document text
- http://pataibicaj.hu/userfiles/file/7898287711.pdfIn PDF document text
- http://dijladentalcenter-qa.com/userfiles/file/66204429345.pdfIn PDF document text
- http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/tazawe.pdfIn PDF document text
- http://consade.com/userfiles/file/78687579604.pdfIn PDF document text
- http://plafondchauffant.fr/img/user/file/jinikoxiwisevapi.pdfIn PDF document text
- http://musicpark-live.de/userfiles/file/zoxetozakujuzawonavotek.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6a8785eeb62e17601a24f550e2964e62/zedanakexi.pdfIn PDF document text
- http://vecsecity.info/editor_up/68169638376.pdfIn PDF document text
- https://cytokin.ca/upload/editor/file/57203297487.pdfIn PDF document text
- http://geomanteia.com/userfiles/files/gepobugaleg.pdfIn PDF document text
- http://sgo-bage.com/public/files/files/91060866777.pdfIn PDF document text
- http://boletos.luzservicos.com/ckfinder/userfiles/files/fanogosutowipadivu.pdfIn PDF document text
- http://nordicwalkingturak.hu/_user/file/67170870874.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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000b327.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB327 | 10828 bytes |
SHA-256: fb6abd29ce67fc14c4a8f252a8ba6cf29922e1115d1813631849e39dfda1eb9c |
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font_01_sfnt_off0000cbb3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCBB3 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e3c5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE3C5 | 17208 bytes |
SHA-256: 6b8820eed45fa23ffa30f6334cffcd17a6372bfe47346ff1526ff5309e54317d |
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