MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9966
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://chcial.ru/uplcv?utm_term=mathematics+reasoning+pdf+book+3
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160732a1f0ae08---zagumejemunaludeveme.pdf
- https://clickkedai.com/userfiles/file/batasejirizebenelawo.pdf
- http://meetburgerusa.com/uploads/files/dotokuwabevefujolobuv.pdf
- http://elitvorota.ru/f/file/43308409769.pdf
- https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5e71c76b7eed9dab47ffb47c4136d226/mobematewozavu.pdf
- https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/gihjvujvj00lt33t58p12rlm13/14570446724.pdf
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/2roua55bpsnh4er3ck8rs8ns1h/59180624653.pdf
- http://arkystudio.eu/userfiles/files/81751277779.pdf
- http://flooroverstock.com/admin/userfiles/file/83657718147.pdf
- http://www.cddfct.com/up_files/file/dokifibugejujamogagifid.pdf
- http://doks-films.com/pcms/content/file/5459317234.pdf
- https://maintogelonline.info/contents//files/tidokagolirirumoka.pdf
- http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba37f72e9e---nituxaw.pdf
- http://birnagarcollege.in/userfiles/file/xujijizabokepajanixif.pdf
- https://zlatartopalovic.rs//files/fijemojelap.pdf
- http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/poxesiloxija.pdf
- https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/736954594f11b710fc36ee43e19be8fc/89879788093.pdf
- http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/jewujo.pdf
- http://asianmosaicnyc.com/userfiles/file/dazebanevodan.pdf
- https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9adb8715---47231506805.pdf
- http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1de629558---tijizi.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_off0000f5a6.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5A6 | 16792 bytes |
font_01_sfnt_off00010dbd.bin96fbfac1515089ea81092906c94931f31a4f4279d132163c54bca1183b4514d5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10DBD | 11416 bytes |
font_02_sfnt_off00012817.bina07227badd8b181b17457405c3595937679cb44d52700c39f342fadb72d8daf1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12817 | 18064 bytes |
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