MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are part of a link farm hosted on disposable or compromised domains, suggesting an attempt to redirect users to malicious content. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://philabc.ru/uplcv?utm_term=photo+recovery+pro+apk+mod
- http://xn--49s538bo8ux8c.net/userfiles/file/59739158898.pdf
- https://dichvuketoansg.com/luutru/files/39053721823.pdf
- http://elistaprezentow.pl/userfiles/file/vefanibejosoguv.pdf
- http://www.espace-hotelier.com/ckfinder/userfiles/files/78595498564.pdf
- http://nhahanghienminh68.com/upload/files/31387600363.pdf
- https://optical-axis.com/uploads/files/202109031400286043.pdf
- http://brmhn.com/userfiles/file/20210907000703_bcaay0.pdf
- http://nacyc.jp/Upload/file/20498890428.pdf
- http://gd-weimi.com/upfolder/e/files/20210916064839.pdf
- http://areopag-group.ru/sites/default/files/uploads/79336818682.pdf
- http://leadingedgecorporate.com/user_images/file/69459915250.pdf
- https://hebatkeren88.com/contents/files/80432954748.pdf
- http://mamolenasnc.it/userfiles/files/57958445166.pdf
- http://zamdq.com/filespath/files/20210921050748.pdf
- http://sujitonweb.com/userfiles/files/benivopagudedadaza.pdf
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161307e8547665---84735049326.pdf
- http://onlineticketreview.com/images/file/14289313818.pdf
- http://i-daa-wl.de/userfiles/40828125689.pdf
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/ebaa475cf0dcd6916b958befda767835/10735176400.pdf
- http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16136baaa73b9b---84160100594.pdf
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/s3ptog1n8fsa4tduttkch5hocs/9288886191.pdf
- https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/8632e8ba2ae2ac7384fb0815261dab59/67677035755.pdf
- http://zkmeiqi.com/admin/ckfinder/upfile/files/xivobekujak.pdf
- http://tvsatkrosno.pl/userfiles/file/65405761177.pdf
- http://meetburgerusa.com/uploads/files/76653657571.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_off0000d732.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD732 | 16792 bytes |
font_01_sfnt_off0000ef49.bin2b34f68c3bc2f5cd4b48e7ae7062a9d40abc049d8b3939c6c514acf69c343062 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF49 | 10644 bytes |
font_02_sfnt_off000107c1.bin4534c54868a0676a3067587d36d52b22d318f389f5d7a53d16cbc215d5e049f5 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x107C1 | 17448 bytes |
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