MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
T1059.007 JavaScript
This PDF document employs a social engineering tactic, presenting itself as a 'Form 49aa correction form pdf' to trick users into installing a browser extension or update. The presence of numerous external links, many hosted on compromised WordPress sites or disposable domains, suggests a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to facilitate further compromise or credential theft.
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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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://ketchas.ru/uplcv?utm_term=form+49aa+correction+form+pdf
- http://houselandia.ru/files/17206513764.pdf
- http://kapelski.pl/userfiles/file/1021789347.pdf
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/87qj25acbripfaoqgtdi40k4ko/juvojetetigabugirobeti.pdf
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/d1266670a012e3f99315ac379111cf44/jebozojikapos.pdf
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff5ee9cb61---tafekugowizikavizezunoxap.pdf
- https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/9j6ipgjbmo4qd0m9qs38af6199/xatoxozukirezu.pdf
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3aaa5a68---46824478493.pdf
- https://ksboutlet.com/file/files/lurusibetidudutoxe.pdf
- https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/l80olrfnqtdue2etvgdrth6975/40021787965.pdf
- https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8671a29b8804df47fae169be3ed7a735/26995599277.pdf
- http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a331e170302---85693030930.pdf
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b411cf1673---wutajovaramafagegagagiwa.pdf
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee1333227---pakepubibakufawi.pdf
- http://thedewakohchang.com/image/upload/File/owozasogiwojup.pdf
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/a10705072453966c76f7dfb20a458743/908508768.pdf
- http://yasaitogo.com/uploads/files/jatofedifuronetubenilosad.pdf
- https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/126f6c9b44269e3fa04b71cdcd26edbf/kijosanunenagobezifepawe.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
- 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_off0000c7a6.bin79a6803e10c63c22bad3e0a237913e6ebf7e36ae5b29c99c5f4d04af3f855619 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC7A6 | 5288 bytes |
font_01_sfnt_off0000d99c.binb337e3a1f0eb12f7c2d6bae54bb572b4db7b19410a6887ada54e745949656355 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD99C | 10420 bytes |
font_02_sfnt_off0000fd5c.binc41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD5C | 16164 bytes |
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