MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or unknown domains, likely for credential harvesting or further malware delivery. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly support this attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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://nscenter.cn/upload/files/zolajewemoxikeg.pdf
- http://kaitosushisb.com/uploads/files/famunuloweditazusar.pdf
- http://thietbiotovn.com/Images_upload/files/sokomebiromax.pdf
- https://tdemo.order-pro.com/ckfinder/userfiles/files/xapixasefowaxigi.pdf
- http://slhospital.com/upload/fckeditor/file/40722142220.pdf
- https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613971c169541---falukexemomipumosili.pdf
- http://share-world.tw/userfiles/file/kewirafitunelifomi.pdf
- http://wrtour.com/FileData/ckfinder/files/20210903_573A10976455EE47.pdf
- http://sksound.com/userfiles/file/wodulejerisudaga.pdf
- http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/nekugixu.pdf
- http://naphogacomposite.com/upload/files/63215432149.pdf
- http://ambulanceservice.pl/userfiles/file/mapufekasamepirom.pdf
- http://lex.tj/img/file/sodiluvavip.pdf
- https://magicdiscoradio.com/userfiles/file/22592517906.pdf
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/3406d56e287e6d9c15e335eed13c81f7/55809370158.pdf
- http://kiko168.com/UploadFile/file/20210913144701643.pdf
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613867f11ab81---43545803969.pdf
- https://alexspa.pl/userfiles/file/ledebubujifer.pdf
- http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/uvmnvgrrnt3pnafqol83hr7sj1/vixini.pdf
- http://labuchedeberce.fr/userfiles/file/39564027007.pdf
- http://www.ktgroup.co.uk/ckfinder/userfiles/files/tavokasudupot.pdf
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161409561ef923---wadudiwefenonogiwaxabuba.pdf
- http://amuseonline.com/absite/userfiles/file/jorodifowo.pdf
- https://un7un9b3rl1pa7-99.com/contents/files/26224348637.pdf
- http://tinhdauvietnam.vn/upload/files/7670611329.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=basic+physical+chemistry+pdf
- 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_off0000db17.bin7f6535f5a0bdc74d9ab3e4b3694736f98b1aa4f437de3b6072638da848f59afe |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDB17 | 10828 bytes |
font_01_sfnt_off0000f41c.bincd7448f4fb2eebeeabfaa6214e5b70f6e3a515f21d384a0efa5074a4561a61c4 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF41C | 18328 bytes |
font_02_sfnt_off00012372.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12372 | 16792 bytes |
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