MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous URLs hosted on compromised or disposable domains, likely to facilitate the download of further malicious payloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9949
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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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=curriculum+design+volume+one+pdf
- http://massimomoroni.it/userfiles/files/38806762655.pdf
- https://gimenezricarte-deltabogados.com/ckfinder/userfiles/files/65264058112.pdf
- http://kamennykoberec.eu/editor_uploads/system/files/regonilafuniwuxaj.pdf
- http://perlawarmii.pl/userfiles/file/76685047703.pdf
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086788952d2e---wivevubakidob.pdf
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de092ce6b---8686926811.pdf
- http://51www.org/uploadfile/file/3f5346a098af072905031ff07223c641.pdf
- https://bnbtravels.com/ckfinder/userfiles/files/bedegupusesurivetazijow.pdf
- https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d653af12bd6---35914514246.pdf
- https://palcev.ru/userfiles/file/55261382857.pdf
- http://leaguengn.com/userfiles/file///68689514956.pdf
- http://angelescare.com/userfiles/file/xipunarunomawenatava.pdf
- https://anthonygillant.com/userfiles/file/19305483791.pdf
- https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ce1dbecce---janaruma.pdf
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608199930e3e8---vorikuzitawesogisu.pdf
- http://dahchen.tw/userfiles/files/keramed.pdf
- https://bikeid.net/ckfinder/userfiles/files/wagivaligediwisito.pdf
- http://morard-mcf.fr/data/Files/64565554278.pdf
- http://envigest.cz/upload/file/zigodulatexav.pdf
- https://33mobility.net/uploads/files/35813990032.pdf
- http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a56b4433527---xatat.pdf
- https://gilbertems.com/videos/file/38646124222.pdf
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddb0813ed---zuvazijifujomenatafi.pdf
- https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/0jv48b8c1u39su76394b9uss9t/95495800513.pdf
- https://alexandrapanayotou.com/web/images/static/file/ponuruvinefobaxula.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_off0000d13c.bin39cb960d5b330e065a0aee07437749f2a15a1ba35ecc75be9c6e74e0a5531c48 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD13C | 17664 bytes |
font_01_sfnt_off0000fea7.bindbb57c5f7c87073db9ed55bb20b3b9669236d9c0f56e280e09a63fbed806efcd |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFEA7 | 10900 bytes |
font_02_sfnt_off000117a9.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x117A9 | 16792 bytes |
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