MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF sample was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics, along with numerous extracted URLs pointing to compromised or disposable hosting, suggests the document is part of a link farm designed to redirect users to malicious content. The SE_INVOICE_LURE heuristic further supports the phishing pretext, likely aiming to trick users into clicking these links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://synerhu.ru/uplcv?utm_term=flowchart+questions+and+answers+pdf
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4c2199fa---45480221816.pdf
- http://grawerlik.pl/userfiles/file/sinefubovamezebolisi.pdf
- https://samarpanbharat.org/trila/userfiles/file/92488742600.pdf
- https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/9a2ccf1cdae5754812be9d983d723cde/gixaxaz.pdf
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/28885ca3a70a3c4a28638f0407d31d36/83077400842.pdf
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc6c653cd8---26436530691.pdf
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/17df10138dbcc0635c336984e6b06d94/93250788769.pdf
- http://matsonconstruction.net/userfiles/file/barojuzedepapaneg.pdf
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d184b9a1b7---tefajefafibalevimudek.pdf
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609db5ac8fa88---sadugo.pdf
- http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b209c37532d---71274637379.pdf
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/db916363e5256de024d9ff028d6c93f8/witugatuxekeg.pdf
- http://tnslib.net/userfiles/files/nalobamusudafojerimul.pdf
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c8d7e5498---78393080285.pdf
- https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/869ce53a896df943bd1f9c68be08f2bb/tadivowif.pdf
- http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/8doj1mte30lbbak35kjfpkeqr3/61859074041.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- 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://scripts.sil.org/OFL
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000cd14.bin5c4f9c908e3860780afdbf2f205e980ef18dc8ddc1c37daf4fbefd0b8e2fd21c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCD14 | 5416 bytes |
font_01_sfnt_off0000df8d.binab8673bc863867fd57db40e967cd645c7ff177a1ca1086d8e7185a87ffbc64ff |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF8D | 10668 bytes |
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