MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous heuristics identified it as a PDF link farm, with many links pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful websites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9966
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://krisoc.ru/uplcv?utm_term=the+inferno+dante+alighieri+pdf PDF link annotation
- http://absolutelyneon.com/userfiles/file/46018753614.pdfIn PDF document text
- http://pooq-design.com/app/webroot/fckfiles/file/62611140091.pdfIn PDF document text
- https://alakharia.com/public_html/userfiles/file/20061768267.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc5badc48---99253919246.pdfIn PDF document text
- http://speckrepej.com/upload/file/26536819132.pdfIn PDF document text
- https://ist-lb1.istanajp.com/contents/files/sotopumevu.pdfIn PDF document text
- http://biancoacolori.it/userfiles/files/fufumefavopabiginuwuro.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/9987b6aaef7d29eef8ec9e4f1ccb543f/33113984948.pdfIn PDF document text
- http://mprime.net/ckfinder/userfiles/files/tolepomovawupatunag.pdfIn PDF document text
- https://akvaguru.hu/user/file/28997244610.pdfIn PDF document text
- https://dongcohonda.com/userfiles/file/fitevu.pdfIn PDF document text
- https://huanghecables.com/d/files/92009202406.pdfIn PDF document text
- https://willmarareachamber.com/ckfinder/userfiles/files/97178776554.pdfIn PDF document text
- https://gaziemirkentkonseyi.com/upload/files/15434417985.pdfIn PDF document text
- http://czerwoneiczarne.pl/files/file/gemak.pdfIn PDF document text
- http://tetobox-budapest.hu/uploads/files/30929703060.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b49bcae725---58132774059.pdfIn PDF document text
- https://www.ventisilva.com.br/ckfinder/userfiles/files/79483098483.pdfIn PDF document text
- http://ccsl.asia/files/zuwufevixepofizal.pdfIn PDF document text
- http://csc-021.com/userfiles/file/20210912162302_9tyamm.pdfIn PDF document text
- https://vinacomvietnam.vn/uploads/news_file/56212847537.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_off0000f20c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF20C | 10572 bytes |
SHA-256: dda1a792ef4237221a86e23a0d38a27e30baf2afc051d9b29c04eedd41a141e1 |
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font_01_sfnt_off000109da.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x109DA | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000121ec.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x121EC | 17184 bytes |
SHA-256: 028a64b1f64d19879ea17927525391e867976024da2d1b8264b67c20891a4f30 |
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