MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS upload storage, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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=learner+driver+log+book+pdf
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/26d236c3da463e56ef1d5a8c106ddcad/77677959724.pdf
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/aba116754614d00e4d3edf54531595c6/pegefudujaburevi.pdf
- http://zvaracskaskola.eu/editor_uploads/system/files/68106550466.pdf
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddae34b7f9---mefobu.pdf
- https://mavachhaiphong.com/upload/files/78677109625.pdf
- http://dekobonner.de/userfiles/file/41064824964.pdf
- https://dobski.pl/userfiles/file/34981223324.pdf
- https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136d6ec3a5a6---35011595538.pdf
- https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161390336a8bdf---46174652008.pdf
- http://ducnhua.com/upload/files/60944798239.pdf
- http://shinhwacar.com/userData/board/file/15805188796.pdf
- http://essiac.cz/UserFiles/file/94789009191.pdf
- https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615071dbe62f5---52611571282.pdf
- https://tattica.byespresso.com/app/webroot/files/upload/files/79885248129.pdf
- http://itfkarnataka.com/cvsprojects/SSK/Source/2.0.0/images/files/773858995.pdf
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161401ac6a0a01---83642012257.pdf
- http://xedaptap.net/userfiles/file/vawomukimalufaz.pdf
- http://unseenadventure.com/userfiles/file/82095043077.pdf
- https://butzbacher.turnpoint.jo/app/webroot/upload/files/43033232003.pdf
- http://schokofontaenen.de/idata/30253448598.pdf
- http://stfurnimart.com/file_media/file_image/file/sisolofuzotademe.pdf
- http://digitalpolicycouncil.org/imagenes/file/bagugesosugu.pdf
- http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef903ded3c---kuwisid.pdf
- https://pilot-nav.socksnbows.com/ckfinder/userfiles/files/mukexudedizafexiwirate.pdf
- http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/vidafuzakudader.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_off0000b4f7.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB4F7 | 16792 bytes |
font_01_sfnt_off0000cd0e.bin244b74a6ca28e20f8b3a23863c3c11870144164bb6e83bdc406cf5a1849489c6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCD0E | 10660 bytes |
font_02_sfnt_off0000e516.binb063f4e29acb8919d9afd344b93391cadffc7560165b616d0ebb049d0007ea15 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE516 | 16384 bytes |
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