MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary attack pattern involves leveraging these links to deliver a secondary payload or conduct phishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9912
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 https://synerhu.ru/uplcv?utm_term=extralinguistic+information+examples
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0ed258bc1c3312efa8501169e8cc298d/tabobifobi.pdf
- http://sk-uralstroy.ru/uploads/files/76888112328.pdf
- http://pfmconsulting.org/survey/userfiles/files/viwulujabilawewimipusot.pdf
- http://nage-z.com/ckfinder/userfiles/files/14444842769.pdf
- https://mamap.in/ci/userfiles/files/67270748722.pdf
- http://lhdrum.com/User_File/UpFile/file/20210908224923_YnVzb3Rpbmlsb3dva2lrYXZpbg==.pdf
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156087117d3f---23151251385.pdf
- https://kamarkosong.com/contents/files/nowiwudus.pdf
- http://poultech.net/d/files/gunedajidazagidaberezaw.pdf
- http://tchid.net/userfiles/file/xominagitigogek.pdf
- http://ibsdhc.hpds.work/ecdemo/web/js/ckfinder/files/files/tiworojo.pdf
- http://toanthinh.vn/webroot/img/files/34989651468.pdf
- http://graviroz.hu/ckfinder/userfiles/files/23767947648.pdf
- http://polkovnik.su/upload/file/vomisulimolowesivepov.pdf
- https://dhesient.com/media/67707474051.pdf
- http://gokea.org/upload/editor/files/31199555109.pdf
- http://zjhywt.com/images/upload/File/xebasirawefogetefutap.pdf
- http://star-transform-moscow.ru/uimg/files/tovitogilitatejenuritonux.pdf
- https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/3ue8o3c21sqihfntv9nv4i1bhn/xaferegobarejov.pdf
- http://police8coop.com/UserFiles/file/mizovebejofekaforak.pdf
- http://redemaisfarma.com/userfiles/file/birogijovom.pdf
- http://vaynhe.com/upload/files/29498424180.pdf
- https://megalightgroup.lv/uploads/files/57182393912.pdf
- https://xn--nmqu14inmf.com/upload/files/natijudilarupofudoza.pdf
- https://renebeumer.nl/userfiles/file/6044342771.pdf
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161340188d6bb0---70169721694.pdf
- 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_off0000e8ef.bin162835fde052d48a59ae5590680c56e8867ab6d621a51d324a34f0334f929983 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE8EF | 11008 bytes |
font_01_sfnt_off0001028b.bineba674969a014c264c0fb207911dea97b33297fed556d8efa97512087617ffd0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1028B | 20240 bytes |
font_02_sfnt_off0001383d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1383D | 16792 bytes |
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