MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was identified as malicious by a ML classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to other PDF files hosted on compromised websites or disposable domains. This suggests a multi-stage attack where the initial PDF serves to redirect users to potentially malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://infrive.ru/uplcv?utm_term=free+epub+downloads PDF link annotation
- http://hai-bi.com/uploads/files/202109130454066692.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0c67b09a1---3320000028.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/tobakokosamorobinodod.pdfIn PDF document text
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16137b6fe570a6---41004399825.pdfIn PDF document text
- http://calisnt.com/uploads/files/malujegudezinot.pdfIn PDF document text
- http://istanbulballoons.com/ckfinder/userfiles/files/47714155398.pdfIn PDF document text
- https://we-plus.tw/ckfinder/userfiles/files/98950797361.pdfIn PDF document text
- http://studiomontironi.eu/userfiles/files/3195448814.pdfIn PDF document text
- http://bamila.vn/luutru/files/28032913230.pdfIn PDF document text
- https://tiemhoamo.com/data/dulieu/files/39021888892.pdfIn PDF document text
- http://radio-salsa.fr/php/rs/filesupload/file/naxiguni.pdfIn PDF document text
- http://highspiritsmusic.com/ckfinder/userfiles/files/1012664917.pdfIn PDF document text
- https://vegas-shop.net/uploads/files/45636644926.pdfIn PDF document text
- https://highlander-inn.com/assets/userfiles/files/76755796034.pdfIn PDF document text
- http://cdn.eagle.mn/uploads/userfiles/files/gozolugujeliwad.pdfIn PDF document text
- http://i-p-p-c.com/ckfinder/userfiles/files/xadepulikujobunosedot.pdfIn PDF document text
- http://www.mariabeckmann.com/fotos/uploads/files/fatovoromod.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/85afdfd25eac7d52321f21a5da11a63d/mixiruzideretafexu.pdfIn PDF document text
- http://iamsong.vn/uploads/files/derepixomodabevorawuze.pdfIn PDF document text
- http://warehousetraining.ie/images/busenetedema.pdfIn PDF document text
- https://baruipur.org/ckfinder/userfiles/files/25985764314.pdfIn PDF document text
- http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vididegumapuxibowobalelum.pdfIn PDF document text
- http://www.oneworldkarate.com/fckeditorimages/userfiles/file/jelif.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/161354aeeec3b4---ramamolonero.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000dffe.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDFFE | 10496 bytes |
SHA-256: cbae910dff889bae8fc4721a39c7c59cd7cff1395e125c4889af18857bf90786 |
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font_01_sfnt_off0000f7c1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7C1 | 18972 bytes |
SHA-256: 63e1d3b7dfc5ab8497ad993ba1548def5dda66b1967efa0009856598c8f51b44 |
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font_02_sfnt_off0001283d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1283D | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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