MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating phishing and Trojan activity. It contains a large number of embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.
Machine Learning
- Nyx PDF Classifier malicious score 0.9942
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://krisoc.ru/uplcv?utm_term=itchy+skin+after+shower+no+rash
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee7f3eb0f1---tituxoga.pdf
- https://ms01bet.net/contents//files/dawas.pdf
- http://www.rotudavid.com/ckfinder/userfiles/files/64361743335.pdf
- http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160919c98e3011---taxijuv.pdf
- https://toptenstudy.com/upload/files/BodyFile__60D76D163DECD.pdf
- https://trotusgrup.ro/ckfinder/userfiles/files/28223228121.pdf
- http://samafb.org/uploadfilefiles/24354748450.pdf
- http://verduciautodemolizioni.it/userfiles/file/39301592350.pdf
- https://chmelo.hu/sites/default/files/file/40611381217.pdf
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/fpp3dv0thrv1ifgiufojbbsct4/gexifaxojokizex.pdf
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/d2750f866f23f6ad8cf421250f7ee49c/60008763141.pdf
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/2c54kpoopt9uj33eiji0kc27e5/nuximufipesogorosixa.pdf
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/ne5mogn3h1gk4938a5fbloe89o/piganubiruvapigadavomi.pdf
- https://cosplay-expo.it/ckfinder/userfiles/files/merakixagaxol.pdf
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/c5c608597cf8aa6f25ccf2aabdd624ab/muwige.pdf
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa2e02f4ec---15698948480.pdf
- https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/6115fd1a408859c4376fd3c2e26d6738/63102912823.pdf
- http://waltwhitman1964grads.com/clients/6/6c/6c9ae932573016e5ff31759a10dce4b4/File/jakugudimavifix.pdf
- https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/b80c2a39909b3aea602bf5ecf7dc9285/futowakugemuref.pdf
- http://jtour.vn/userfiles/file/37515403583.pdf
- https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160964784d0f9b---viwarosuviviweziparaj.pdf
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609f65be66c56---zusokevuvazakiv.pdf
- http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/40798523141.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_off0000fcf4.bin186ce1705a05f2f1e73b82f0b6d43d458685716aaf77ef1031e6da803f0b88a7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFCF4 | 10628 bytes |
font_01_sfnt_off00011557.binf67797b791f7a91a8d8522ee5ea2516970cd2e8e651c38026a2c04337898cb57 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11557 | 17568 bytes |
font_02_sfnt_off0001432d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1432D | 16792 bytes |
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