MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
This PDF document employs a fake CAPTCHA lure to deceive users into interacting with the content, which is a common tactic for phishing or malware delivery. The presence of numerous external URLs, many pointing to compromised CMS upload directories, suggests an attempt to host or distribute further malicious content. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the execution of a second-stage payload via embedded JavaScript or other exploit vectors.
Machine Learning
- Nyx PDF Classifier malicious score 0.9846
Heuristics 8
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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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Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHADocument displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
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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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Urgency / deadline lure low SE_URGENCY_LUREDocument contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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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=find+people+fast+and+free
- https://legouic-peinture.fr/userfiles/file/67754637484.pdf
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/94886aafafbe4adb0f918c1048a3e367/69276095206.pdf
- https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/cgmrd7llffuf4s2vttkuklkc8g/93526490609.pdf
- https://bojovicsirogojno.com//files/nuzasukorigejegukebaxanub.pdf
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd99279abb---mijevexapezosaligibul.pdf
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b007d28be26---fejikijorizawulis.pdf
- http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/lugedobobogusekolugovisoj.pdf
- http://bouncebodysupplements.com/newerac2c/userfiles/file/zodeb.pdf
- https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/7a3b0c14da2bbf7bc17851c477ee5c3a/rawonevur.pdf
- https://mimpishio1.com/contents//files/xolaxevejatobekoka.pdf
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee5b998241---98049730360.pdf
- https://stratasphere.online/userfiles/file/40506960278.pdf
- https://infotechb2blite.com/bot/ckfinder/uf/files/44595330270.pdf
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/462a8dc9fc0141e8c3752846218b1797/totalevojerenolepikawova.pdf
- https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/0b349758f526d20b4b93e6ea7d832129/gorevemolefijusuvoleva.pdf
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb55d330020---36980514423.pdf
- https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbbfa23223c---mozobudusapumino.pdf
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bce742c5f42---laziz.pdf
- http://robwalker.net/fckupload/file/62214748628.pdf
- https://alsharqcc.com/userfiles/files/vuzijiligovesewit.pdf
- http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090b28bbc270---weravelufow.pdf
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606f939930fe9---dedexiwotak.pdf
- https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/fda810831d4e0c67ce5c2af6c9b91633/winijoz.pdf
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddfcfcf135---70361944531.pdf
- https://evboosters.com/wp-content/plugins/super-forms/uploads/php/files/d679d8de3597273a6ccab0d9f9cd9e5a/gotolevujepamezoz.pdf
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/bjgems7m0ldapo1g1nrt6406eu/xolelaj.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_off0000df8a.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF8A | 16792 bytes |
font_01_sfnt_off0000f7a1.bin5b00a1da29d2f4d0118d17b7576d402c3aa8b8a639cf8bc35554f7e597519d03 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7A1 | 10468 bytes |
font_02_sfnt_off00010f73.binb60a406336134b1e091c66b0d5c9664b176e22a659e0108dda58fbe9cefaeeeb |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F73 | 17028 bytes |
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