MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous embedded URLs that form a link farm, directing users to potentially malicious websites. Heuristics indicate these links are hosted on disposable or compromised domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
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=aplicacion+para+recuperar+archivos+android
- http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/121223099969.pdf
- http://euredit-editions.com/userfiles/file/90956422111.pdf
- http://izr.fr/files/81907996431.pdf
- http://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/85796644768.pdf
- https://holocaustresearch.pl/nowy/photo/file/74878076889.pdf
- https://electroagro.es/pub/files/konigin.pdf
- https://zegaoyun.com/calisma2/files/uploads/dugilibaxenazisonagibinit.pdf
- http://www.scea.edu.mn/ckfinder/userfiles/files/78271196464.pdf
- https://takarasushimn.com/userfiles/files/65467820775.pdf
- https://raiporjai.com/piceditor/file/67722329886.pdf
- http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/49764101305.pdf
- http://www.leposeur.fr/site/upload/ckfinder/files/mimomudugovaba.pdf
- http://pskov.agisinfo.ru/uploads/content/files/9434323813.pdf
- http://hbisan.com/userfiles/file/luxuwezememuguwek.pdf
- http://spiregene.com/image/files/20210927_091604.pdf
- https://ooobelkom.ru/ckfinder/userfiles/files/74218625151.pdf
- http://budropol.de/Upload/file/dikafuzirefumerebibepalat.pdf
- http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/wugadebili.pdf
- http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/siwuxe.pdf
- https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/rbr68m374v9ktdd9ar9rjja12f/55132045298.pdf
- http://unstitchedfootwear.net/files/file/29949223571.pdf
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/701efa15cc3e18081b19e6351f6e504e/mokaxavoven.pdf
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b34d5b58ef---dobabamiwarerub.pdf
- https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd36ac6a3a---sobuzerevajonirisi.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_off0000b440.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB440 | 16792 bytes |
font_01_sfnt_off0000cc52.bin963d2b593a63d94c1b881c4322c0a4ceae6abb0c823a639dedc9a1920960c927 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCC52 | 15884 bytes |
font_02_sfnt_off0000f446.bin874c8f9689c071ca2c7a312485a39d2a62820a8f9d052ed2da980c2295de42ef |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF446 | 10660 bytes |
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