MALICIOUS
196
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document employs a social engineering lure, instructing the user to install a browser extension or update to view its content. This is a common tactic to facilitate malware installation or credential theft. The document also contains numerous links to external websites, some hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://allytemp.ru/uplcv?utm_term=how+to+stop+chrome+from+blocking+websites
- https://nyirfa.hu/uploads/files/74492345948.pdf
- https://premium-house.uz/images/file/robadevutinatovara.pdf
- http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/84142692885.pdf
- http://patriabrno.cz/userfiles/files/27965325733.pdf
- http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75750773282.pdf
- http://www.herbertvanderbrugghen.nl/draft/ripojoz.pdf
- http://grafiport.com/userfiles/file/finole.pdf
- http://zlhk.ru/upload_picture/file/89888236150.pdf
- https://sunsoftinfoway.net/ckfinder/userfiles/files/gapurulivudavisusasor.pdf
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614076f17126d---10182712511.pdf
- https://girisimhaber.com/uploads/file/35887534440.pdf
- http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161409d2878b18---19410323329.pdf
- https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/970c1b8cf6f34a17f2dfe2a7c57a3898/woxizuxewomebujok.pdf
- https://semot.com/Store/userfiles/file/26133989749.pdf
- http://goldenmallbiotech.com/upload/files/pofikujipe.pdf
- http://ecohort.com/userfiles/files/66806788865.pdf
- http://tongchangkj.com/uploadfile/file///2021090321512133.pdf
- https://accidentmatters.com/ckfinder/userfiles/files/16510044502.pdf
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9763e73e3---12742414176.pdf
- http://citra.cl/userfiles/file/litumuv.pdf
- https://mmoxx.mn/userfiles/files/43747663110.pdf
- http://schokofontaene.de/idata/48340016513.pdf
- http://ayrh.internet-match.com/upload/files/pixole.pdf
- https://legyenegyjonapod.hu/userfiles/files/56822027519.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_off0000d885.bin276ad0fd0f497eec0628971498073b67de8087282670af229e3e97c3bdbf7dda |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD885 | 17756 bytes |
font_01_sfnt_off00010699.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10699 | 16792 bytes |
font_02_sfnt_off00011eb0.bin54fedaa63c375ee96fa4673cfc50db195d602b4a183202bdc7d2db0ff0eebefc |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11EB0 | 11076 bytes |
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