MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS uploads, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple external URIs and a link farm heuristic supports the attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 6
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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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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://alstar.uz/images/shared/file/65535623053.pdf
- http://laureysnv.be/uploads/files/97740823946.pdf
- https://ww150004.linebot.net/upfile/files/20210914160736.pdf
- https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/bcd2d8892c7f7b50ab45bd5eb3e4d3d2/bifijoxe.pdf
- https://www.indoorclub-informa.com/boletines/img/file/rerozilofaro.pdf
- http://madmojo.com/fckupload/file/vodaxegubonuzako.pdf
- http://nhatrangpalacehotel.com/app/webroot/upload/files/vexuriripuwaxefoti.pdf
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/pvg1ap36jqdbcgq7nevhc57rcr/18898003105.pdf
- http://runo34.ru/attachments/file/45100005378.pdf
- http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147245b3241f---dutenekat.pdf
- https://kanalprofi.at/UserFiles/file/28820894120.pdf
- http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/42643420560.pdf
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/2728f093cd6a80f8e55c5fcb90cd63ad/88515359658.pdf
- http://weldingplaza.com/files/file/wozikixazazotebuvavew.pdf
- http://ipceurope.be/assets/file/20960302247.pdf
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1613846bc52f6e---beluvexetunozikodisaxuw.pdf
- http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ronoditisojasijolib.pdf
- http://kleinschaden.expert/userfiles/file/34243617275.pdf
- http://stroykap.com/application/views/stroykap/userfiles/file/21623760739.pdf
- http://spodne-pradlo-2bpoint.sk/UserFiles/File/6306734987.pdf
- https://alibrahimtravel.com/mycms/uploadedimages/editorUploadedImages/file/vixekefoxaxenevefaf.pdf
- http://bebaldebaran.eu/userfiles/files/kisojitefatidexigosoxomex.pdf
- http://gesht.ru/admin/ckfinder/userfiles/files/11355725417.pdf
- http://shijijiaming.cn/filespath/files/20210917211434.pdf
- https://willes-gb.com/uploads/files/202109082351274008.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=once+upon+a+secret+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_off0000b312.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB312 | 16792 bytes |
font_01_sfnt_off0000cb24.bin026b5a822983ffab744c20768018a63db2d69393420437383e9acc7b85df950a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCB24 | 15292 bytes |
font_02_sfnt_off0000f1f1.bina3092d3f316e0f78fa2835a02b9ce6cd7c0c4eefa0775f33d21a647b09cfcb5b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF1F1 | 10600 bytes |
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