MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further support this phishing or malware distribution vector.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
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=short+a+and+long+a+words PDF link annotation
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134abd626bb5---gokemorowumo.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/f6k5kal28n8jqtlfuutcshtapg/53137670894.pdfIn PDF document text
- http://retrolondontees.com/userfiles/file/guzepazixerub.pdfIn PDF document text
- http://childprotectionindia.com/lexcyberia/userfiles/files/84117088581.pdfIn PDF document text
- https://www.sistemkabin.com/ckfinder/userfiles/files/navadikazoj.pdfIn PDF document text
- http://sushi-belovo.ru/files/496129491.pdfIn PDF document text
- http://northmarking.com/userfiles/files/5672918203.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613276088a006---83714458509.pdfIn PDF document text
- http://marleenjansen.nl/images/uploadfiles/97202454631.pdfIn PDF document text
- https://gagiongvitgiong.com/ckfinder/userfiles/files/32852086237.pdfIn PDF document text
- https://kotypsy.pl/ckfinder/userfiles/files/sanadawaveguzol.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/094c4643ce9d5f52be46dc6274d3aff6/kosowubibowugokemoxebusuk.pdfIn PDF document text
- https://fgcrubochi.com.ng/ckfinder/userfiles/files/54189228486.pdfIn PDF document text
- https://mgogs.com/mgfiles/file/47726031745.pdfIn PDF document text
- http://schule.havonix.com/ckfinder/userfiles/files/45442826828.pdfIn PDF document text
- http://ebslang.net/_UploadFile/Images/file/53275740409.pdfIn PDF document text
- https://ibrahimkoc.com/images/Media/files/98758684938.pdfIn PDF document text
- https://vnjhanoi.com/upload/files/komojekunozug.pdfIn PDF document text
- http://liweisteel.co.th/ckfinder/userfiles/files/zakodujuxatojadewew.pdfIn PDF document text
- https://benmoonpharma.com/userfiles/file/55135586707.pdfIn PDF document text
- http://archifolder.com/userfiles/files/11121500170.pdfIn PDF document text
- http://bippex.com/filespath/files/20210904110636.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_off0000b800.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB800 | 16100 bytes |
SHA-256: 9472cab44390de4e22dec49976c40c8896acc0bf1fd5d3c2cd721cb4fbef5c3e |
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font_01_sfnt_off0000e123.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE123 | 10464 bytes |
SHA-256: a9a09a6293b42aaf1187567a1b8a05e4465f788e11ca23e3be64a72fead64459 |
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font_02_sfnt_off0000f8af.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF8AF | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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