MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.
Machine Learning
- Nyx PDF Classifier malicious score 0.9980
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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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://krisoc.ru/uplcv?utm_term=cute+themes+for+android+phones PDF link annotation
- http://quiltingacademy.com/fckeditor/userfiles/file/72607141079.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/48035994420.pdfIn PDF document text
- https://tarzminder.com/resimler/files/mokaditukasu.pdfIn PDF document text
- http://sprinter-lab.ru/content/File/lotonurar.pdfIn PDF document text
- http://meyanko.com/userfiles/file///73973763409.pdfIn PDF document text
- http://lecieldesandes.fr/ckfinder/userfiles/files/48898122448.pdfIn PDF document text
- https://aviatroglo.fr/IMG/file/29058743519.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/69b24707dce1ad5527a19b49096d4a6b/90878620942.pdfIn PDF document text
- https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/6219058151.pdfIn PDF document text
- http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613deb1a8679b---nuzepadobewajaj.pdfIn PDF document text
- https://giriconsultancy.com/content_files/files/40684725130.pdfIn PDF document text
- https://www.rongoldmanlaw.com/system/js/back/ckfinder/userfiles/files/pewodajudeduzukidavesazi.pdfIn PDF document text
- http://daiwavn.com/uploads/image/files/wajurokevunaxedakun.pdfIn PDF document text
- http://tid.vn/upload/files/41540053099.pdfIn PDF document text
- http://iccjsc.com/images/uploads/files/22662549630.pdfIn PDF document text
- http://wxmx.cn/upload/ckimg/files/202109052258205391.pdfIn PDF document text
- http://aasghsflqsae.handylover.com/upload/files/tuvekubeduwolutokipe.pdfIn PDF document text
- http://adamex.ukrkarta.ua/fckeditor/userfiles/file/5093021332.pdfIn PDF document text
- http://staresecurity.com/userfiles/file/nadodurozilanipujowesu.pdfIn PDF document text
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/rsngbggfep848j87fpe9go2v55/nirogaluverul.pdfIn PDF document text
- https://rivieresoceanie.com/userfiles/file/32942045647.pdfIn PDF document text
- http://mvdeastudio.it/userfiles/files/pamoruponosesamomujab.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_off0000e72c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE72C | 17620 bytes |
SHA-256: d0174dcde3c1a6cd41c956199f547e23cee8f12ab6f8af05ecb4e0ec13597cb2 |
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font_01_sfnt_off00011549.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11549 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00012d60.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12D60 | 10848 bytes |
SHA-256: 04dec661a96c0e589f667142813e10107c98c32dff67882e7a412abcee78afcb |
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