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, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, pointing to numerous external URLs, some hosted on compromised CMS platforms. The presence of many links, including those with 'utm_term' parameters, suggests an attempt to manipulate search engine results or direct users to potentially malicious content.
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://sieuthigo.vn/upload/ck/files/vekezexetumekuziwi.pdf In PDF document text
- http://taiwanquinoafamily.com/shopadmin/upload/files/50462298637.pdfIn PDF document text
- http://vdi.vn/userfiles/file/kovenusorudas.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7b0bcd58c---77668281910.pdfIn PDF document text
- https://apluskleaning.com/admin/images/file/tupomotowazisaw.pdfIn PDF document text
- https://wotfiles.com/ckfinder/userfiles/files/loremiw.pdfIn PDF document text
- https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/5bf2d66ff7604dd5d2656184501793ae/gifipekuginisiduregifev.pdfIn PDF document text
- http://baovephuongtroi.com/vietkiendo/upload/file/sexin.pdfIn PDF document text
- https://frontivo.ro/userfiles/file/89959310046.pdfIn PDF document text
- http://mbjarrahi.com/UploadedFiles/New/file/davifetun.pdfIn PDF document text
- https://bibliotheque-des-arts.com/ckfinder/userfiles/files/60815524921.pdfIn PDF document text
- https://coolinterier.sk/upload/files/26323698088.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1831cd468---81681545820.pdfIn PDF document text
- http://busankid.com/webfiles/board/file///jefotojo.pdfIn PDF document text
- http://vicc.huh.hu/UserFiles/File/fajufigebeno.pdfIn PDF document text
- http://zs-oilfieldequip.ru/d/files/zonevaduzo.pdfIn PDF document text
- http://lt101shop.com/userfiles/files/58236573699.pdfIn PDF document text
- http://theclelandgroup.com/img/upload/file/67453022712.pdfIn PDF document text
- https://martensmgt.com/business_school/uploads/file/judipeju.pdfIn PDF document text
- http://ksnjl.com/userfiles/files/dilifepuvovifiduwo.pdfIn PDF document text
- https://architektor.ru/uploads/file/16382304999.pdfIn PDF document text
- http://highspiritsmusic.com/ckfinder/userfiles/files/bujebebu.pdfIn PDF document text
- http://mybed.tw/uploads/files/202109101318591019.pdfIn PDF document text
- http://talesma.com/E/file/figizaxudofinerif.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=create+hidden+folder+androidPDF link annotation
- 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_off0000dedb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDEDB | 10316 bytes |
SHA-256: 1f9351e589631440a5c257a8d0e1761f286ab2704c4aef2ef0aefa415a7f6f56 |
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font_01_sfnt_off0000f60c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF60C | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00010e1e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10E1E | 19548 bytes |
SHA-256: 206bae269cf10866d55805187dab1abff1faa7c728c8641e04982c1594302fb7 |
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