MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external links, many of which point to disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The embedded JavaScript likely serves to further obfuscate the malicious intent or to initiate a download. The primary attack pattern observed is the use of a deceptive document to drive users to malicious external content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9947
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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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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://krisoc.ru/uplcv?utm_term=10th+class+biology+book+in+english+pdf+download PDF link annotation
- http://totoquynhhuong.com/upload/files/gumesobimakevezogup.pdfIn PDF document text
- http://kamakuralosgatos.com/uploads/files/bamavivomenidutafadowe.pdfIn PDF document text
- http://kapfenberger-schuetzenverein.at/userfiles/file/62668636588.pdfIn PDF document text
- http://aodaixuan.vn/app/webroot/upload/image/files/fonenitotabigituzifanapa.pdfIn PDF document text
- http://irina-beha.com/ckfinder/userfiles/files/vegenawofojojitu.pdfIn PDF document text
- http://bandwidth.aryanpalace.com/userfiles/file/71935966953.pdfIn PDF document text
- http://wsm.hk/images/files/kepubafofovemakigubag.pdfIn PDF document text
- http://diagcorlifescience.com/attachment/file/80680507273.pdfIn PDF document text
- http://tunecharts.com/userfiles/file/gipizose.pdfIn PDF document text
- https://pankajplast.com/ckfinder/userfiles/files/30008095171.pdfIn PDF document text
- https://zivotzaokny.eu/res/file/83199062231.pdfIn PDF document text
- http://thaide.org/userfiles/file/26977823870.pdfIn PDF document text
- http://seed-hongkong.com/uploads/file/xigowepasubukiwu.pdfIn PDF document text
- http://zeshengtecphar.com/UploadFiles/FCKeditor/20210913143841.pdfIn PDF document text
- http://matchonusa.com/uploads/files/zikufov.pdfIn PDF document text
- https://soechi.id/userfiles/file/58063759588.pdfIn PDF document text
- http://sjanzee.nl/file/57824583396.pdfIn PDF document text
- https://vibangnhadat.com/uploads/files/74102262091.pdfIn PDF document text
- https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/5f7ef48d2cdc533dbe8098e84c2994bc/91123421207.pdfIn PDF document text
- https://manenshop.com/upload/files/jovepuwoxepa.pdfIn PDF document text
- http://www.moyekolodin.com/files/darejitonegamibefaris.pdfIn PDF document text
- http://hangzhou.chinatupai.com/web/js/ckfinder/userfiles/files/ropodobunerepowozuvajo.pdfIn PDF document text
- http://tochuchoinghi.org/files/lazominoxejow.pdfIn PDF document text
- http://swaptoys.org/ckeditor/uploads/files/22143956259.pdfIn PDF document text
- https://liur-krd.ru/userfiles/file/48727029421.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_off0000b277.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB277 | 11308 bytes |
SHA-256: 39afd100fe4a9c089d0949e3d00f483104ff98c1d14406690b4d619fc88d2355 |
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font_01_sfnt_off0000ccad.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCAD | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000e4bf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4BF | 17112 bytes |
SHA-256: d2757c4db42cb8500b184da424459abc5676214dea671622d09809527ed489d4 |
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