MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The `PDF_SEO_DISPOSABLE_LINK_FARM` and `PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM` heuristics indicate a deliberate attempt to obscure the final malicious destination through multiple redirects and compromised infrastructure.
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=expensive+bloxburg+houses PDF link annotation
- https://ruxthai.com/ckfinder/userfiles/files/sonajimidovewo.pdfIn PDF document text
- http://epmachine.ru/d/files/nusofagetimijejorexama.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/toxamasirosili.pdfIn PDF document text
- http://meruzhankhachatryan.com/app/webroot/files/file/23648048000.pdfIn PDF document text
- https://www.verimevzabavu.cz/ckfinder/userfiles/files/3805377878.pdfIn PDF document text
- http://studiolorenzino.eu/userfiles/files/zixodiwimadewu.pdfIn PDF document text
- https://senarathgroup.lk/assets/media/file/xikomojovuwajuzigaj.pdfIn PDF document text
- https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/78591990863.pdfIn PDF document text
- http://studiobaliva.eu/userfiles/files/26582866783.pdfIn PDF document text
- https://herfection.herfection.tw/upload/ckfinder_temp/files/20210904015447.pdfIn PDF document text
- http://liyangah.com/Upload/file/dirijenogafoguwa.pdfIn PDF document text
- https://cylinder96.ru/admin/ckfinder/userfiles/files/21554956442.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131b221526f7---13018221973.pdfIn PDF document text
- http://jor-agric-aqua.com/user_img/files/46505446155.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137910b14ea4---6661401627.pdfIn PDF document text
- http://delve-cr.com/uploads/naduviwebefediwiwumu.pdfIn PDF document text
- http://studiotecnicomancini.eu/userfiles/files/jabuz.pdfIn PDF document text
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/dc4a76ac11bb047d57588928deb878a0/45835034510.pdfIn PDF document text
- https://saatyapi.com/upload/ckfinder/files/pagevukumubenumosovapona.pdfIn PDF document text
- http://jingyitech.com/uploadfile/rosujuzosu.pdfIn PDF document text
- http://vipacademy.org/userfiles/file/7234427237.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_off0000fd79.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD79 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0001158b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1158B | 18992 bytes |
SHA-256: e45a27197364a3d4e73cae329314285df567492b4db34e7305d1846548c300a7 |
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font_02_sfnt_off000147a0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x147A0 | 10660 bytes |
SHA-256: 02a96a7754e86272d4e279981948c3088efaad7f9d24581639cb933b243e3945 |
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