MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 User Execution: Malicious File
The sample is a PDF file flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a browser extension/update installation lure, a common social-engineering tactic. The document body is heavily obfuscated, but the presence of numerous external URLs, many pointing to compromised CMS upload storage or disposable hosting, suggests a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure and URL patterns are consistent with malicious document delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://oniceh.ru/uplcv?utm_term=chrome+mobile+not+working
- http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/64707267579.pdf
- http://kondicionery-krasnogorsk.ru/upload_picture/file/52614384067.pdf
- https://profipreklady.cz/www/ckfinder/userfiles/files/jasusidiviwivakajiduxu.pdf
- http://saigondome.com/uploads/userfiles/file/32478945670.pdf
- http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ea49eba8d6---14320083405.pdf
- https://dom4m.by/userfiles/files/71304264353.pdf
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161471ac22c421---57239504579.pdf
- https://tranthachcaodanang.com/uploads/image/files/lebunurofuwibugebasif.pdf
- https://wroclaw-effatha.pl/grafiki/file/rofibobelana.pdf
- http://phuwangnam.com/user_file/file/neribijenoferip.pdf
- http://1-champagne.com/blog_images/blog_/file/39600900768.pdf
- http://jjmcp.jp/userfiles/Image/file/kojexegijiz.pdf
- https://mehreganimaging.com/images/upload/files/rimikena.pdf
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/eabb5913701b6f2cdb3c59ac7531d1e5/13204507625.pdf
- https://oilbasaro.com/web/images/ckfinder/files/20210919224910.pdf
- https://novahealthclinic.ca/userfiles/file/pisamigobevotu.pdf
- https://worldcastlive.com/userfiles/file/8492565068.pdf
- http://wxhsbl.com/ckfinder/userfiles/files/20210914_065033.pdf
- http://diencongnghiepvohoang.com/uploads/files/rukazorakemojilolow.pdf
- https://kit-veron.my/ckfinder/userfiles/files/1624937629.pdf
- https://decoveinvestment.com/userfiles/file/27520968154.pdf
- http://noithatachau.vn/webroot/img/files/14132349908.pdf
- https://www.potravinyav21.cz/ckfinder/userfiles/files/wofefekim.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_off0000d7e4.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD7E4 | 16792 bytes |
font_01_sfnt_off0000effb.bin4e29b014e24f7be7a04ec0d332515d22a48371bf8d8f6250a79998856d6f6a30 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEFFB | 10576 bytes |
font_02_sfnt_off000107f1.binc6bc2ec6b7e7e511bd351ade4145e61cc49d897cac230876d9bc5648ae1a449e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x107F1 | 16700 bytes |
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