MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress sites and disposable hosting. These links likely serve as a link farm to redirect users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9913
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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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=country+level+domain
- http://mynigaoe.com/upload/file/20210628183115.pdf
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acc9ad731d1---kujexo.pdf
- http://moristas.com/userfiles/files/pogat.pdf
- http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609e55ea13c69---xuvevonuxisuwijaw.pdf
- http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/17879296853.pdf
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afc613c6186---rowujufefiselezifabi.pdf
- https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3f0h85i4tfs52a2gbs96q13u54/laxali.pdf
- http://chamdure.com/DATA/files/90072672709.pdf
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c97a9fb3c15---kidujifafisasetekaguke.pdf
- https://moraure.net/js/ckfinder/userfiles/files/jajivumexofolutugokoliv.pdf
- http://benhvienlaptop.biz/userfiles/file/zabazadukovobonubefagik.pdf
- https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd027cd19b0---sugabapaku.pdf
- http://luatsutiengtrung.com/app/webroot/uploads/files/15002327162.pdf
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608515126da1a---21073544794.pdf
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/02399385a79a351eed3ef2e2d0d5df40/45013204053.pdf
- https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9e379cf33f0b8824e9bd14a6ccd49277/jubolob.pdf
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/fgu17nf6q7o7d1qjn0792jcb46/dafafamubezosinawane.pdf
- https://hitourkorea.com/FileData/ckfinder/files/20210703_FB50E62785FB3773.pdf
- https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b59ed3eeb2b1231e97bf8456e06d704/sesukegewi.pdf
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160b64cafa3399---muboginumanel.pdf
- http://musorcentrum.hu/files/article/file/jonopenawore.pdf
- https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/3c1n32q1aqlv47gakho7q7gf37/firaxulipet.pdf
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/j5hf9n7cv1e6r0fqdjct9sb00o/sefizeriviziwusum.pdf
- http://penzionklara.cz/userfiles/file/54346643046.pdf
- https://virtualpulse.eu/UserFiles/file/bawezarumagigekikime.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_off0001cc42.bin2e3c5ad17880b86c9580b1f2e6cf4ef00974050f336cfac8220b9c0fc7d0f6e3 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1CC42 | 17916 bytes |
font_01_sfnt_off0001fbbb.binb7479606bc203f295e1e852e2ab721e0c787f2ee1232072b145268e13f700e4d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1FBBB | 10552 bytes |
font_02_sfnt_off000213d4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x213D4 | 16792 bytes |
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