MALICIOUS
172
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or delivering malicious content. The presence of numerous external URIs, many pointing to compromised WordPress sites and disposable hosting, suggests a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 8
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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 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 https://queure.ru/uplcv?utm_term=netzwerk+a1+textbook+pdf+free+download
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a0d93cf13---93412102893.pdf
- http://mrs-edu.com/sribati/editor/uploadfiles/monudazux.pdf
- http://meghdoothsuzuki.com/uploads/nomawor.pdf
- http://mitcostruttori.it/userfiles/files/22756109737.pdf
- http://nonstopsushi.com/uploads/files/68909831052.pdf
- http://garageanything.com/js/upload/files/fogit.pdf
- http://alburigiott.it/userfiles/files/95207696709.pdf
- https://foundlight.ca/home/foun6192/public_html/files/custom_files/file/popenofemodazelodalagar.pdf
- http://bandbaajabarat.com/ci/userfiles/files/ramazepizujuxaribul.pdf
- https://heuresromantiques.com/upload/files/lajiladamivad.pdf
- http://mdtrend.hu/files/file/13838001782.pdf
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d466ba6efd---keberibelininedefezefuve.pdf
- http://holzbau-napetschnig.at/rumusu.pdf
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161318d63822b1---94788625613.pdf
- https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/temisedidituxesekakokoj.pdf
- https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/71e37eca2fa8ccad672c1d38da40f0ac/mekedi.pdf
- https://producedepot.us/userfiles/files/36441689860.pdf
- https://xaydungdonggia.com/app/webroot/files/images/pages/files/mozedamimexemumogeba.pdf
- http://acsalma.hu/userfiles/files/xalodetupemevopeka.pdf
- https://gulfb2b.com/userfiles/file/47221928071.pdf
- https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/gogapu.pdf
- http://thueotodn.com/uploads/image/files/jiwakuranejexifefebuxon.pdf
- http://dragoniresorts.com/userfiles/4314393223.pdf
- https://zlato-eu.cz/upload/files/pimobit.pdf
- http://tlumacz-francuskiego.pl/userfiles/file/jafuzetikil.pdf
- 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_off0000d56f.bin63269f1de85fb91c56f72085dc7068bec26325cb7fde5c2aa13bd82fabc09ac7 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD56F | 18420 bytes |
font_01_sfnt_off000105e1.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105E1 | 16792 bytes |
font_02_sfnt_off00011df8.bin24a3bd15133614555a8fb6408eefb0913dc2e0839a5692fcc2b958ca668f855c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11DF8 | 10740 bytes |
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