MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9963
Heuristics 6
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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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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://krisoc.ru/uplcv?utm_term=calculus+free+response+answers
- http://hkt-optics.com/hkt/images/userfiles/file/bitesuvupobuwer.pdf
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64ae0e3a6c---74578324464.pdf
- http://oishisushigd.com/uploads/files/monijoxudexetuxunut.pdf
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160904051cd4f2---5495619069.pdf
- http://smflow.in/admin/uploads/file/kuzubika.pdf
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a075edeedf9---72036349342.pdf
- http://aldo-ins.com/userfiles/file/2707978301.pdf
- https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/0si1lt28m8bjkekofmqqq3rgm7/zanit.pdf
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/mtt73u1p9nlcaqe2mo6bi8gikt/45059629950.pdf
- https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/54bb1e44a6d9ef5bb0ea7cd77bc2106a/8540431621.pdf
- http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075bdf986163---sunuzibole.pdf
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3eb9ba491---nodob.pdf
- https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/fvddic5067vkfgl4v8lrft0set/vazomolotewelekabavi.pdf
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0445e5e26---wasogegijumalu.pdf
- https://nanyangtextile.com/userfiles/file/xefufi.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a6cf8ebd5a5c2bf88bad0806520f2d78/2802122903.pdf
- http://qazaqbanki.kz/data/content/files/65030659384.pdf
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3119652d57---punizedifojemojo.pdf
- https://net-mex.hu/ckfinder/userfiles/files/dibijuv.pdf
- https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/54c4393cc0bb55af4d5b30b1765c0000/mejiwuguxedumewutejelawoj.pdf
- https://oliogalanis.com/file/84957662859.pdf
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/bf03e445537520f0910fcb8a17320ebd/rebasejotunawor.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_off0000c7df.bin5592e2977bf5b0d1c4ca23213d35650ec7cd3031f0fac2a81f3266d0251f52e7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC7DF | 16416 bytes |
font_01_sfnt_off0000f28e.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF28E | 16792 bytes |
font_02_sfnt_off00010aa5.bindc3d05e870096a096e9c230f878626b8692e886be4983cedb4eadb2e61044d2a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10AA5 | 10500 bytes |
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