MALICIOUS
174
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external links, many of which are algorithmically generated and hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for further exploitation or credential harvesting.
Machine Learning
- Nyx PDF Classifier malicious score 0.9980
Heuristics 7
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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 to algorithmically-generated URL high PDF_RANDOM_URL_LINKPDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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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=general+psychology+textbook+pdf PDF link annotation
- http://adbuilder.at/ckfinder/userfiles/files/padakubemek.pdfIn PDF document text
- http://hk-keber.de/images/file/porisajomakiwegufetuj.pdfIn PDF document text
- http://investbuild.ru/var/upload/file/wokinexod.pdfIn PDF document text
- http://chieucoingason.vn/files/49225955302.pdfIn PDF document text
- http://divodizain.ru/ckfinder/userfiles/files/gerujar.pdfIn PDF document text
- https://rybczewice.pl/userfiles/file/mepotavojudogugefef.pdfIn PDF document text
- https://generalaudit.pl/eurostyl/photos/file/bopaxididobi.pdfIn PDF document text
- http://bestbelly.org/content/files/files/91072216864.pdfIn PDF document text
- http://cnfglgreat.netsociality.com/upload/files/vimosodalolodisiginav.pdfIn PDF document text
- http://olddieselparts.com/ckfinder/userfiles/files/zepiribugodojutazoz.pdfIn PDF document text
- https://chatsystem.site/js/ckfinder/userfiles/files/judeluwiz.pdfIn PDF document text
- http://samtekelektrik.com/files/51609471442.pdfIn PDF document text
- http://ambulatorioveterinariocigliano.com/userfiles/files/60857847530.pdfIn PDF document text
- http://hoangnamjsc.com/upload/files/51432652616.pdfIn PDF document text
- https://jsptti.com/ckeditor/ckfinder/userfiles/files/xipuvozezopuzavavafetuwel.pdfIn PDF document text
- http://duet-czluchow.pl/userfiles/file/15928249126.pdfIn PDF document text
- http://tutaylamhet.com/storage/ckfinder/files/24523817.pdfIn PDF document text
- http://sugarfree-gelato.com/upload/file/vegasatuvidabizeji.pdfIn PDF document text
- https://fobh.net/userfiles/files/40407942288.pdfIn PDF document text
- http://jump360.co/upload/files/20210907190142.pdfIn PDF document text
- http://matchonusa.com/uploads/files/66759830069.pdfIn PDF document text
- http://bygreenpure.com/userfiles/file/sixapemilavutuv.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_off0000bc3d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBC3D | 11292 bytes |
SHA-256: 0c7671034edf9f4a7e93a9f11825250604a8e056414003b21b062839eda77007 |
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font_01_sfnt_off0000d663.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD663 | 18948 bytes |
SHA-256: 4f09b20de42f0c2b10376c084b96aa7cc4a484c223d964575f0ae4651716f95f |
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font_02_sfnt_off00010866.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10866 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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