MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features a link farm pointing to numerous PDF files hosted on various domains, suggesting an attempt to obscure the ultimate destination or to distribute a payload. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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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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 http://fenotropil.ru/userfiles/file/sokutivuwukokifufak.pdf
- http://tsutae-f.com/js/upload/files/75664762730.pdf
- http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608636e854f29---2008128147.pdf
- http://hysansam.com/fckeditor/userfiles/image/tumudomugipesuvafeninapo.pdf
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/83cbgb8j4saa18lpcqu6id7eg6/xuneko.pdf
- https://alutat.com/data/file/juzutazaka.pdf
- https://alexandrapanayotou.com/web/images/static/file/gixobipodogik.pdf
- https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ecae36595297f9164527addc92fc1958/xupunazuwiwudoxirusaxo.pdf
- http://alexanderjamesbackcatalogue.com/userfiles/file/komajuna.pdf
- http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/46177586881.pdf
- http://tfh-filter.hu/_user/file/91113830425.pdf
- http://shs1977reunion.com/clients/41590/File/60613243864.pdf
- https://qnzar.com/files/24231076058.pdf
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16071c1e7d5958---69529972951.pdf
- http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/rovepopoxa.pdf
- http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/dovenugifalinikixataduw.pdf
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085685ca260b---70997046239.pdf
- http://bezagsecurity.cz/userfiles/fuxutomaxoko.pdf
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160767de98da19---rovitoranimevixegikovat.pdf
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced94c48d28---zavomutifanewatupagaw.pdf
- http://asea-admin.com/_userfiles/file/20210606120511.pdf
- http://firewheels.pe/userfiles/file/minumisewevamoti.pdf
- https://jodhpurtravels.com/nbloom/fckuploads/file/12366898947.pdf
- http://hanboo.cn/Uploads/file/2021052018260270554.pdf
- https://bbpartner.cz/userfiles/file/52724632600.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=moy+medical+centre
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000c5b4.binfab345a54e15e762acde8b11a5318019de54eafd6d4d48bea25cfafc3f117f1e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC5B4 | 10468 bytes |
font_01_sfnt_off0000dd73.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDD73 | 16792 bytes |
font_02_sfnt_off0000f585.bin6703d4d7bc84d7377474bf216d889cb085d4bd50471978972c59b30793c88325 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF585 | 16728 bytes |
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