MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links to external sites, many of which appear to be part of a link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish for information. The presence of a 'Fake invoice / payment lure' heuristic further supports the malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9977
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://drafthe.ru/uplcv?utm_term=how+to+fill+out+a+mailing+letter
- http://webinaris.biz/ckfinder/userfiles/publics/files/bodikovoniwefiwuv.pdf
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144403c81168---lipuxurizodetuwoterev.pdf
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/35d149f92e4c7410019f0611097eeeed/xikifa.pdf
- https://aneri12.cz/res/file/lujireboki.pdf
- http://www.pes.edu.mn/ckfinder/userfiles/files/tasuwikido.pdf
- http://www.tiande-global.com/ckfinder/userfiles/files/sujuzopotigu.pdf
- https://oolong-dining-co.com/webroot/editor-uploads/files/rujoneko.pdf
- http://michalpavlicek.com/uploaded/file/890882141.pdf
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc0d7723b74a32ad6022be0c71226439/wegufizatonofuzaweva.pdf
- http://lsphc.com/userfiles/file///kolovabepakugo.pdf
- http://karinameal.com/imgdish/files/74776690341.pdf
- http://rurisnet.org/images/file/jeperezokekenurab.pdf
- https://alebusph.centralcms.cloud/galeria/files/midezegofa.pdf
- https://promoxcenter.ro/ckfinder/userfiles/files/ponobabivofabugadured.pdf
- http://nagymester.com/userfiles/file/subifezoraserer.pdf
- http://aesg2edcv.handylover.com/upload/files/22461480077.pdf
- http://anhbanglaw.com/userfiles/file/tojovopa.pdf
- http://weiken-rc.com/upload/files/kivutojokurolad.pdf
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/93f6dfcbe4e0b2a3de4b18dfa9202c14/83455159433.pdf
- http://historico.uts.edu.co/portal/app/ckfinder/userfiles/files/29935629932.pdf
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143a2f42649c---noturevazofoj.pdf
- http://koppeika.ru/userfiles/file/jusebilixata.pdf
- http://xn--b1adcbbai1bezln.xn--p1ai/content/File/82996264998.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_off0000e67a.bin5b5ec3b697fd792703bb50c28891a90544b947a80eb1f3926276518f2c39f740 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE67A | 16904 bytes |
font_01_sfnt_off00011240.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11240 | 16792 bytes |
font_02_sfnt_off00012a57.bin6d54f7ef87fb7dda5983a9df4afa7b2539b8334e52174e953476bdb05d7fa2cf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12A57 | 10568 bytes |
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