MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised websites or disposable hosting, and one URL specifically mentioning a 'black hole' redirect. The 'SE_CALLBACK_LURE' heuristic strongly suggests the document is designed to trick the user into making a phone call, a common tactic in tech-support scams or callback phishing operations.
Machine Learning
- Nyx PDF Classifier malicious score 0.9966
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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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://wastran.ru/uplcv?utm_term=black+hole+is+not+a+hole
- https://sledovani2.gpshlidac.cz/www/userfiles/files/94090190417.pdf
- http://laibros.com/ckeditor/userfiles/files/17437285219.pdf
- http://shangyi-pump.com/uploads/file/060934022739.pdf
- http://refinerlink.com/userfiles/file/tirekugip.pdf
- https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/ls7dkvhjk4fnbe0e0ikp4c0cco/88063910678.pdf
- https://budgetparking.ca/admin/uploads/file/sizisepenewewarivuvixu.pdf
- http://www.cenlaenvironmental.com/siteuploads/editorimg/file/sodebupuwebuniza.pdf
- https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/15291365822.pdf
- http://edu-soft.ru/site/htmlimages/file/62213780952.pdf
- http://biondiairsystem.it/userfiles/files/91459319159.pdf
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16152208dc1cb8---zupukabexinanefon.pdf
- https://smartstone.ca/userfiles/files/49919878643.pdf
- http://a1-automotivegroup.com/upload/files/xafoponebameripidigapo.pdf
- http://aaykpn.com/uploads/editor/files/donepujomita.pdf
- https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f8991d2430b0f1bc54f2c0ae76bcda93/dutulolunobefunegini.pdf
- http://traslochimontalto.it/userfiles/files/78790064507.pdf
- https://suacuacuontoanphat.com/upload/files/kisubuzejujopiworevesoxit.pdf
- http://bunny888.com/ckfinder/userfiles/files/91013075323.pdf
- http://cmcthailand.com/ckfinder/userfiles/files/22431810308.pdf
- http://www.greenfield-sustainability.com/images/files/60672359867.pdf
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/7789f03fe16c46f6d0fd6a30a31c1a9a/14061127981.pdf
- http://worshipedia.mobi/sites/default/files/file/susobobelobum.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_off0000aee8.bin898ecf50aca4df6e3952cbc9f90ea1af2a995795b7fa66cad5d33d2f2bbfabf2 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAEE8 | 14828 bytes |
font_01_sfnt_off0000d41d.bin35652c35e7a3055e54d67a6b350035e4e64faa7e6298df1e5b88988334efb021 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD41D | 10372 bytes |
font_02_sfnt_off0000eb8f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB8F | 16792 bytes |
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