MALICIOUS
164
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 or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a deliberate attempt to create a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware-hosting sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9888
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://smidgel.ru/uplcv?utm_term=amazon+silk+browser+apk+for+android+tv
- https://www.hkha.com.hk/ckfinder/userfiles/files/zujemawuxereveto.pdf
- https://lmbri.com/WYSIWYGImage/file/gonowaz.pdf
- http://alltechsro.cz/files/74526257697.pdf
- http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139cfbf6d283---domolujekipav.pdf
- http://tw-jia.com/uploads/files/202109160211589332.pdf
- http://ferien-in-zahren.de/images/file/mifanugopuxezunun.pdf
- https://slide-bearing.com/d/files/63755830391.pdf
- https://akgoz.zemta.com/uploads/files/gefutiwowuliluwudewazi.pdf
- http://offerparts.com/upload/files/8251712598.pdf
- http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/64435217715.pdf
- http://xindeshiye.com/uploadfile/file///2021090318415728.pdf
- https://relaxbotanika.cz/ckfinder/userfiles/files/tipex.pdf
- http://erfaspot.com/resimler/files/36818116516.pdf
- http://shriramashramssschool.org/userfiles/file/bimakinotix.pdf
- https://imaggu.com/ci/userfiles/files/65747148146.pdf
- https://alpinebadmintonacademy.com/ckfinder/userfiles/files/xozutobamalugoziripa.pdf
- https://cristalparkhotel.com.ve/ckfinder/userfiles/files/72781381557.pdf
- https://medpressa.ru/files/file/konalepagu.pdf
- http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/temolule.pdf
- http://headrepublic.pl/images/files/8971040884.pdf
- https://olgunbey.com/upload/ckfinder/files/gewamexuwepetexopar.pdf
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b30c7dac2---nekozezufinatefal.pdf
- http://assisdrive.pt/userfiles/file/roporixokoginizuwejesoki.pdf
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613d38645dfa3---39957057752.pdf
- http://redigonda.it/userfiles/files/8653902065.pdf
- https://emtracing.net/userfiles/file/2978405582.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_off00010fd0.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FD0 | 16792 bytes |
font_01_sfnt_off000127e2.binc62cae0dc61aa9b5e170c02b44b2803383c8b43f70c603547564ae4cf7528033 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x127E2 | 19152 bytes |
font_02_sfnt_off000159cb.bin39afca89004276ee3c1838f273cf70fb3d17b5c8d4cc446f75e37bda1eafdb5a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x159CB | 11084 bytes |
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