MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous external URIs, many of which are part of a link farm, suggesting an attempt to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9948
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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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://ketchas.ru/uplcv?utm_term=bpsc+question+paper+64th+pdf PDF link annotation
- http://dissanna.com/temp/fckeditor/file/revidog.pdfIn PDF document text
- http://hit-air.pro/ckfinder/userfiles/files/66211056595.pdfIn PDF document text
- https://shatalarab-llc.net/userfiles/files/toxazopiwidesafufogox.pdfIn PDF document text
- https://congthuonghotel.vn/app/webroot/files/images/pages/files/5477115169.pdfIn PDF document text
- http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92474226752.pdfIn PDF document text
- https://foundryindia.org/userfiles/file/kevinesobason.pdfIn PDF document text
- http://dvg.asia/ckfinder/uploadfiles/files/gudiresixijosaku.pdfIn PDF document text
- http://cerritos.songhakbbq.com/uploads/files/vurusisozuw.pdfIn PDF document text
- http://quiltingacademy.net/fckeditor/userfiles/file/sigixipewazik.pdfIn PDF document text
- http://automsystem.com/UploadFile/file/20210906015939426.pdfIn PDF document text
- https://www.theknowledgeonline.com/files/lib/ckfinder/userfiles/files/86641997509.pdfIn PDF document text
- http://epoxidice.ro/mm/file/61964172982.pdfIn PDF document text
- http://hotelbellevuepalermo.com/userfiles/files/kamavuvese.pdfIn PDF document text
- http://popmetre.com/news/files/loxeperirafox.pdfIn PDF document text
- http://carnow.jp/js/upload/files/nejavobumesubo.pdfIn PDF document text
- http://proleague.dk/userfiles/file/zufokosudemu.pdfIn PDF document text
- https://phucatgarment.com.vn/ckfinder/userfiles/files/94542006690.pdfIn PDF document text
- https://signika.pl/Upload/file/30129506345.pdfIn PDF document text
- http://capthepcongtrinh.com/uploads/news/files/rofujumuga.pdfIn PDF document text
- https://verredistri.fr/xmedia/file/80592374916.pdfIn PDF document text
- http://colantuono.it/userfiles/files/89574779023.pdfIn PDF document text
- http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/6e2d975406cda8dba041b8b7cdfc8400/29991533002.pdfIn PDF document text
- http://aokisuper.com/ckfinder/userfiles/files/xokeguvefatusolitezan.pdfIn PDF document text
- https://andana.us/files/files/33708235474.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_off0000b8cb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB8CB | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000d0dd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD0DD | 20384 bytes |
SHA-256: f292f1e1cdfe0e27f583186d1c0ecd6433beca75e94ef4874cfaf9fa048e70dd |
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font_02_sfnt_off00010611.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10611 | 11216 bytes |
SHA-256: c4086ca4cf6351c2170efaf1a6cffeba1310639caaeb0d1abdab37cd8529aca6 |
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