MALICIOUS
134
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9930
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://coretry.ru/uplcv?utm_term=modern+optical+engineering+pdf PDF link annotation
- https://mygrind.ie/userfiles/file/92627014481.pdfIn PDF document text
- http://sluchatka-shop.cz/files/upload/files/wetalo.pdfIn PDF document text
- http://infiniti.e-library.tw/uploads/files/4265344264.pdfIn PDF document text
- http://malabarisproducoes.com/arquivos/files/ruwasonufegi.pdfIn PDF document text
- https://hnhaa.com/userfiles/tnejp/files/nojivonujakugubizop.pdfIn PDF document text
- http://kcpsystem.com/userData/board/file/39391556897.pdfIn PDF document text
- http://boxerdapolenta.com/cmsimple/images/file/55770445337.pdfIn PDF document text
- http://wolfroccatiassociati.it/userfiles/files/85786743506.pdfIn PDF document text
- http://fkjz.cn/upload/files/2021/09/202109021504064753.pdfIn PDF document text
- http://sincaremedicaltour.com/js/upload/33528589534.pdfIn PDF document text
- https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630767761.pdfIn PDF document text
- http://seatraderhk.com/userfiles/60785840667.pdfIn PDF document text
- https://goodnest.info/tctt/sites/aaa/file/miponusujaro.pdfIn PDF document text
- https://vroa.pl/chplusfiles/file/53526481817.pdfIn PDF document text
- https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16137a5ad32df8---41962722090.pdfIn PDF document text
- https://economiadecomunion.net/ckfinder/userfiles/files/wivegujogafilefu.pdfIn PDF document text
- http://studiomarcheluzzo.it/userfiles/files/60092704195.pdfIn PDF document text
- http://kimsanghun.com/upload/userfiles/file/2021982250492437.pdfIn PDF document text
- http://kriosispl.com/cote_dor_import/admin/ckfinder/userfiles/files/71709819486.pdfIn PDF document text
- http://redeyeldn.com/userfiles/file/latuxo.pdfIn PDF document text
- https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf95e14f08---21861180196.pdfIn PDF document text
- http://sirindhorn.net/upload/File/56121751987.pdfIn PDF document text
- http://bananamusic.tw/uploads/files/202109022015599525.pdfIn PDF document text
- http://depcip.com/app/views/panel/ckfinder/userfiles/files/pebekubokobufofexuzew.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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e226.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE226 | 17460 bytes |
SHA-256: 45945917391e38a50efc75508993e4fdffa06b49ac9e512f9dbb99c84b08edb8 |
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font_01_sfnt_off00010ec5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10EC5 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off000126dc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x126DC | 10620 bytes |
SHA-256: a5e9cd889e7f93af0ac4c443243e4e88158adc75e898fe685714e9c5b2fbc62d |
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font_03_sfnt_off00013f00.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13F00 | 17448 bytes |
SHA-256: c5f208fedf0f6678344dfcb987bc88fcb0b79405659361b9403419985a58a256 |
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