MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The file is a PDF that functions as a link farm, containing numerous URLs pointing to external resources. Several heuristics indicate that these links are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a lure to exploit clients.
Machine Learning
- Nyx PDF Classifier malicious score 0.9974
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 http://022-web.cn/uploadfile/file/20210902043648195.pdf
- https://brawlcall.jordanadams.com/ckfinder/userfiles/files/80794889273.pdf
- http://gmkms.net/upfile_editor/2021/files/38366755772.pdf
- https://www.truck-transport.com/ckfinder/userfiles/files/tezoreg.pdf
- https://safe-international.com/userfiles/file/gowusitedabovagalavazatap.pdf
- http://crm333.com/documentos/file/35218244041.pdf
- https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/01ab14968993e4324901eb45fb821b4b/tijapilitipevusonekad.pdf
- https://christianbelieversmatrimony.com/web/christiansbelieversmatrimony/photos/ckeditor/files/gozoti.pdf
- https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/6b2ecqq9p3i7fq6cii3j3ihfhr/63444259469.pdf
- http://abpjseah.news-read.com/upload/files/52765748216.pdf
- https://mygenius.ru/admin/ckfinder/userfiles/files/41826873668.pdf
- https://mkycc4.com/kycc4.com/userfiles/files/begaxelitidir.pdf
- http://fkjz.cn/upload/files/2021/09/202109062325522456.pdf
- http://teusz.pl/UserFiles/file/85931802367.pdf
- http://uhorder.com/upload/files/1943768289.pdf
- http://taixingchem.com/uploadfile/file/20210911010756822.pdf
- http://twfindia.in/userfiles/files/14583291335.pdf
- http://tageedesign.com/ssmpt/documents/file/paweluzegorosufosuporug.pdf
- https://lidiyageorgieva.com/ckfinder/userfiles/files/3700521468.pdf
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613ada158a34b---41038472737.pdf
- https://thai-airpark.com/ckfinder/userfiles/files/dexuvifuxaze.pdf
- https://dongciao.com/uploads/files/202109171805049236.pdf
- https://medicabg.com/uploads/wysiwyg/files/67499461778.pdf
- http://detskypohar.cz/upload/file/kemesobuk.pdf
- https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/4444bb39be1378d8a14653640fde6eea/71561223122.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=what+colors+to+mix+to+make+light+purple
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000df8f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF8F | 16792 bytes |
font_01_sfnt_off0000f7a6.bin0f842f471a515961a425829e441a67d196c924cbba225d7ba56fc7923dd40ee7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF7A6 | 11004 bytes |
font_02_sfnt_off00011148.bin69b5d048159f3b3d32057ce4fffb52f1fb7c097a6715a7af5c87c3aec0c9026d |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11148 | 17432 bytes |
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