MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS uploads. The embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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://pistant.ru/uplcv?utm_term=xi+biology+book+pdf PDF link annotation
- http://dichvugiayphep.net/hinhanh_fckeditor/file/91536517488.pdfIn PDF document text
- http://ventmetal.ru/userfiles/files/44169080543.pdfIn PDF document text
- http://pibar.tw/uploads/files/202109160101045940.pdfIn PDF document text
- http://jurabos.nl/include/editor/file/sofovesakasa.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9aa904dbdb9c66bef1939e3d1a21abbf/41190204118.pdfIn PDF document text
- http://stmarysharipad.com/userfiles/file/52120380428.pdfIn PDF document text
- http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137e74b4687f---85214853395.pdfIn PDF document text
- http://vuadiemtayninh.com/hinhanh_fckeditor/file/7610132432.pdfIn PDF document text
- http://robwalker.net/fckupload/file/pegonur.pdfIn PDF document text
- http://xedaptheduc.net/app/webroot/uploads/files/biseb.pdfIn PDF document text
- http://dayuntang.com/assets/uploads/ckedit/files/20210902123844.pdfIn PDF document text
- http://besttailor.info/ckfinder/userfiles/files/gedutasizo.pdfIn PDF document text
- http://olgapolyakova.com/files/files/86277195773.pdfIn PDF document text
- http://maekalocal.com/Maeka/UserFiles/File/61389519544.pdfIn PDF document text
- https://bruceautoservice.com/files/file/nidesekewesopapafe.pdfIn PDF document text
- http://sushrutproctology.org/ckfinder/userfiles/files/87760905157.pdfIn PDF document text
- http://sql110.com/pic/fifapewiwodoxanejipes.pdfIn PDF document text
- http://formpart.com/upload/ckfinder/files/43086988671.pdfIn PDF document text
- http://uniquehotelsolutions.com/files/others/36013271669.pdfIn PDF document text
- https://smwebtechnology.com/arishayurveda.com/userfiles/file/90464803211.pdfIn PDF document text
- https://trexanh.net/upload/files/15107082424.pdfIn PDF document text
- https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/d1npf1a5mgjmq29kulkl26vfdf/12589563917.pdfIn PDF document text
- https://holcom-solar.com/webroot/img/files/xiregipejovujul.pdfIn PDF document text
- https://jackyrouxmethode.com/userfiles/file/bukofatudifogapozomozu.pdfIn PDF document text
- http://runo34.ru/attachments/file/tajogobefepasulol.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_off0000df44.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF44 | 10260 bytes |
SHA-256: 44326f09216254660306e6f277b669dd2b2d7f6cc2e14a7bf5414064e84a795b |
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font_01_sfnt_off0000f5e8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF5E8 | 18952 bytes |
SHA-256: b3800427e2eb5f2a5bf49aea86b8aa9483f43ff180d6d8815aeb8e770c6011e4 |
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font_02_sfnt_off0001272b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1272B | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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