MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is identified as malicious by ML classifiers and ClamAV, with high confidence. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of JavaScript suggests an attempt to execute malicious code or exploit vulnerabilities within the PDF viewer.
Machine Learning
- Nyx PDF Classifier malicious score 0.9980
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://catamma.ru/uplcv?utm_term=send+via+wifi+direct
- http://vector-mebel.ru/uploads/files/25967647593.pdf
- http://mijinmotor.com/fckeditor/userfiles/file/firipud.pdf
- https://bike-accessories.supersites.gr/content/ckfinder/files/vosudipuxojejofubes.pdf
- http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140a016929cc---jetalekowebuso.pdf
- https://techson-cctv.com/upload/file/81791565414.pdf
- http://aorganboys.handyfriendship.com/upload/files/55656597380.pdf
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145a4bb9b246---rokogu.pdf
- http://wizclub.net/upload/userfiles/file/11529942449.pdf
- http://gyarmatilovastorna.hu/userfiles/file/pojub.pdf
- http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/faviwufemimowiwabasisani.pdf
- http://gdfsztal.com/uploadfile/files/vinegovozugilov.pdf
- http://garantc.ru/userfiles/file/wekusigovakapizepixete.pdf
- https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/10423027733.pdf
- http://cu-mbc.com/ckfinder/userfiles/files/35141048982.pdf
- https://karapinarinsaat.net/userfiles/upload/file/53485366107.pdf
- https://sanidom.pl/img/file/wufebuvotafe.pdf
- https://cfacgroup.com/uploads/FCK_files/file/sesinawipisu.pdf
- https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161430bbbc7d0f---lelufixumugidalelow.pdf
- http://afghansolar.com/userfiles/file/93644457567.pdf
- http://dgone.kr/userfiles/file/20210913061649.pdf
- http://www.msjcongregation.org/www/js/ckfinder/userfiles/files/39700242529.pdf
- http://xn--80aikni6a0b.xn--p1ai/images/file/64044264959.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_off0000ccc8.bin84b7f160890ed26975744db543a6bf9e2874eb109359e6f1367ba7e9aa9562ae |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCC8 | 17524 bytes |
font_01_sfnt_off0000facb.bin35f99ed037d6b760f6f092d4730c9543e92549498a31fcd9adcd91fad914a2fc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFACB | 10364 bytes |
font_02_sfnt_off00011270.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11270 | 16792 bytes |
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