MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing or malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to redirect users through multiple disposable hosting sites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9738
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://krisoc.ru/uplcv?utm_term=medieval+indian+history+books+pdf PDF link annotation
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f8837bd901ef39c3096dac4507647115/31896009784.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a26b0b055b3---20994092874.pdfIn PDF document text
- https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d94813b0585f600b813920ba624e1073/36229305954.pdfIn PDF document text
- http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b560bae342d---gixawuxugutatikow.pdfIn PDF document text
- http://www.pranabkumar.com/fckimages/file/butepitabalamarifogibo.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/e7217a39082c3b0949706d5ef1f901bd/jujamonuginib.pdfIn PDF document text
- https://fisheaglesafaris.net/pics/user/file/wapugidarelan.pdfIn PDF document text
- http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160861e233d9c9---tugegobapowirositejivavev.pdfIn PDF document text
- http://master-sign.ru/ckfinder/userfiles/files/97669521190.pdfIn PDF document text
- http://amandatravel.com/userfiles/file/jigogarur.pdfIn PDF document text
- http://infinity-pro.ru/userfiles/file/98634121058.pdfIn PDF document text
- https://debcopharma.com/userfiles/file/lojozalenix.pdfIn PDF document text
- http://atenngo.com/admin/sites/site/documents/11257835235.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16070a361967c8---11528276405.pdfIn PDF document text
- http://telmeed.com/web/ckfinder/userfiles/files/71227904510.pdfIn PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/d321002f320f0813cc342c427f6fbcf7/xegibajiroxivikomisuza.pdfIn PDF document text
- https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/ui16c5rp2ei5ikkjm47edrq7qp/lovaxofotemurili.pdfIn PDF document text
- https://guruamardaspublicschool.com/userfiles/files/19938745026.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/1868da55c40fa3e9ab81e6ac0ad1ee6b/winedikalopomi.pdfIn PDF document text
- http://diakmelo.hu/ckfinder/userfiles/files/59903906764.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf90471792---88307267253.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/001ms7397puv683lhnu1ad5ff0/lirivigagofitobe.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/52321bf9ea9ed554dda440accf378a0d/xezul.pdfIn PDF document text
- https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/2eev49nl9rnkrkcgfn40ulmpk0/xosenezinevotepuvat.pdfIn PDF document text
- http://kolesnikov.pro/ckfinder/userfiles/files/23572627056.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5449fd2bc7---ditege.pdfIn PDF document text
- http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6d065a500---tojederazasinalat.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00019d05.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x19D05 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0001b51c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1B51C | 11000 bytes |
SHA-256: 3f5766a596fa468c3a813036ccac94eba241d4456e57dbc8bbd18cdd8c1ef01a |
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font_02_sfnt_off0001ce64.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1CE64 | 17816 bytes |
SHA-256: 5776807e7c217db75bda6bee73926fdc0035e196563f34aef35107d7f73e334b |
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