MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF document that utilizes a link farm to host multiple PDF files, many of which are hosted on compromised CMS upload storage. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a fake invoice or payment lure, intended to trick the user into clicking the embedded links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing payload or malware.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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://altbuket.ru/files/matipulamunujepuvopuwa.pdf
- https://mabuksusu.com/contents//files/37465955522.pdf
- http://fontanarosaserigrafia.it/userfiles/file/rinajufatevudefuvaxoluneg.pdf
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075c0f880133---bobovo.pdf
- https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/5b734608e3460be153f034b3fbd60dd7/jatogedisaresib.pdf
- http://lumieretvie.com/userfiles/file/garibituwed.pdf
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/e6tlfqs4htmma34v8d0jnaj7nd/woxegirokipivaranobo.pdf
- http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773a1d0c55b---72475807774.pdf
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bf3b96642e8---52572462986.pdf
- http://pixel-pro.ru/upload/file/61779726801.pdf
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a49598c8b2f91c0ae262785450511e9c/lozasif.pdf
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e6151d4e73ac70c2e5833d72b89cd08a/52566447981.pdf
- https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/q2nqil8dt3cibfntc27sjnib05/guwipekix.pdf
- http://matras-devison.com/upload/file/mugutebexojigizisutoxa.pdf
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/2h73tff9l1ne5uhmj2kpo7558j/40605328886.pdf
- http://geobrofab.com/clients/d/da/da7cd3953015cd63472398095fc1fcdd/File/64868642204.pdf
- http://clairerolo.com/userfiles/file/28885116866.pdf
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/3df626c38b3b834c2dd526a63cd5c383/lotokat.pdf
- http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1609c91071ed68---84256539161.pdf
- http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0eb661b8f---pimesu.pdf
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160848b60f1d79---zikelidizoj.pdf
- http://jghsclass75.com/clients/f/f3/f322050927ea28328664fd088939ffaa/File/84064910846.pdf
- https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/1e3e4cb4159aa45f74b65d9a1d6193b8/ridogujoriv.pdf
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a8f1b7dd6---65163644154.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=income+tax+law+and+practice+book+pdf+free+download
- 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_off0000ec0a.bin3d81babf7f08dbf3a3ad666d8e45173f3f298d9921ca96a382938c1e37176d5b |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEC0A | 10984 bytes |
font_01_sfnt_off00010550.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10550 | 16792 bytes |
font_02_sfnt_off00011d62.binb1534e31ae0d12501471c1a262196e16e83aec9ecafbbc10285ebebed3bac4ce |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11D62 | 16984 bytes |
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