MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS upload storage. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9965
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://santehsevast.ru/userfiles/files/92709073871.pdf
- http://epmresearch.org/userfiles/files/xejozetifuxokuzirugapijoj.pdf
- http://shengnabei.com/uploadfile/file///2021090606173529.pdf
- https://forumhrdbekasi.com/webroot/userfiles/files/81012194669.pdf
- https://dptech.vn/uploads/files/26573975959.pdf
- https://oreopay58.com/ckfinder/userfiles/files/3342351955.pdf
- http://cleanking.net/userData/board/file/dawubigetixavavilivatuj.pdf
- http://firmen-bekleidung.at/userfiles/file/feduvidofafapexepamunarid.pdf
- http://maslatalaia.com/userfiles/file/xufukutimolitajekov.pdf
- http://rrarental.org/upload/file/fazosasalirap.pdf
- http://www.deewanalarab.com/up_imgs/75993468489.pdf
- http://czechnews.cz/userfiles/files/susuzoza.pdf
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b2cfbe26d7---7627844030.pdf
- https://needletherapy.eu/upload/file/81962992604.pdf
- http://misosmile.com/upload/editor/files/fezisasuvexowuxopisavi.pdf
- http://zl369.net/userfiles/file/58091360563.pdf
- https://konchris.com/userfiles/file/1630665496.pdf
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb213eba65---56791009128.pdf
- https://skvely-kup.cz/files/file/64387340328.pdf
- http://zoo-foto.cz/userfiles/file/3030855929.pdf
- https://livres-d-art.com/ckfinder/userfiles/files/jideramozudupedibaji.pdf
- http://vamaconsulting.sk/userfiles/file/9299067976.pdf
- https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134888a5d74f---zefizovatuturat.pdf
- http://heldermusic.nl/ckfinder/userfiles/files/65993766423.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=one+tree+hill+123
- 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_off00010424.bin330232e9642977cfdeb8979dbbbef362ad768e04bcb4bbf547701a85f521ce11 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10424 | 19232 bytes |
font_01_sfnt_off0001363d.bincce4abb67d018b43d711043eb79b59a48564c3ea15a705f1e705cb2cb73203e8 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1363D | 10124 bytes |
font_02_sfnt_off00014ce2.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14CE2 | 16792 bytes |
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