MALICIOUS
212
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The presence of a 'Browser extension / update installation lure' heuristic strongly indicates a social engineering tactic to prompt the user into downloading and executing malicious content. The ML classifier also flagged this PDF as malicious with high confidence.
Machine Learning
- Nyx PDF Classifier malicious score 0.9986
Heuristics 9
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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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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 http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8a6fa7a88917b1594f38be0299fd836d/4372815962.pdf
- http://childhood-matters.com/clients/49507/File/jafuvixubu.pdf
- http://www.urbanwaterways.info/files/rumeweporugi.pdf
- http://teakdeck.pl/files/file/44951983667.pdf
- http://littlepearlspublishing.in/data/eimages/file/pujotuwo.pdf
- https://misbahelmudii.org/ckfinder/userfiles/files/31097971466.pdf
- http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/13596727607.pdf
- https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1606c73e15aef3---rejap.pdf
- http://www.tramag.pl/upload/file/pitoguwudivazudig.pdf
- http://munsusa.org/userfiles/file/20210808164540.pdf
- https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/rdce7uk5jr82ub0oahes016ts6/96211122151.pdf
- https://surupaceanu.ro/ckfinder/userfiles/files/96175626743.pdf
- http://autohondl.cz/userfiles/file/35884319696.pdf
- http://armanetti.com/images/48778020364.pdf
- http://cl-pub.com/files/files/suwenuwomutopijotolul.pdf
- http://hyunbulsa.org/~ewedd2/userfiles/file/97410832941.pdf
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/hu97l5elo6nvg8m1v13lo4gb5u/zanasazopuximozifut.pdf
- https://xistenze.com/files/files/76227490011.pdf
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fa238fce7---nurowakaxa.pdf
- http://hoitruyengiaocodocvietnam.com/uploads/image/files/37340795722.pdf
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8361055b01ccbba122906ce9ddcca954/pigejatiwojurojowusexobe.pdf
- http://hiace-yoshikawa.com/js/upload/files/95236528750.pdf
- https://thaiwoodengames.com/files/upload/files/mijogilujetijiwaga.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=bigasoft+video+er+serial+key+free+download
- 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_off0000f6cf.bincf41d036990fe3f951bb2460fde831370e02fddb73a6b20a17132c1cd002b6b6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6CF | 17440 bytes |
font_01_sfnt_off00012481.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12481 | 16792 bytes |
font_02_sfnt_off00013c98.bin1163bb2fe27b9c7518d3f0666d0de792fb94bcaa6bfff22dc72daf5732bbcc0c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13C98 | 10940 bytes |
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