MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users to malicious sites. The PDF also contains a large number of external URIs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware or lead to phishing pages. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.
Machine Learning
- Nyx PDF Classifier malicious score 0.9948
Heuristics 7
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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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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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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://synerhu.ru/uplcv?utm_term=tracing+numbers+1-5+pdf
- https://airbays.com/userfiles/file/1960491264.pdf
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c60f11d0fe---55922074228.pdf
- http://kondicionery-krasnogorsk.ru/upload_picture/file/32839044411.pdf
- http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/kuluwetevi.pdf
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853257204f3---40209118087.pdf
- https://hiperaktivite.info/userfiles/files/lofebobafidudebabofevob.pdf
- https://85097781.com/upload/files/zeredesomalipoxoloxa.pdf
- https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/f5c8031cdef2ad7a64e04531078bb2d2/kewiraguzexelatijige.pdf
- https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd0cef61d3b---83331085869.pdf
- http://jagatjyotischool.org/jagatjyotischool/userfiles/file/52985853622.pdf
- http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe5fdef881---25670551327.pdf
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/a60d8234a7bd66c416f07b67c2cc4d9d/digolevasubavewefu.pdf
- http://ok-poland.com/userfiles/file/27749505979.pdf
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ea5887c8e4597fd100f2221c0df844d8/pujuxexulumusevitit.pdf
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/f7bf13735262ae03383c033b322f011c/vezubetonabebaluzemewoxor.pdf
- http://to-kajihan.net/js/upload/files/32653041281.pdf
- http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608219932e2fc---88699870212.pdf
- http://inannamsao.com/uploads/files/96439486973.pdf
- https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/dfmhib8js79qv4toq68ce0uovr/31177066975.pdf
- https://acryl-bg.com/userfiles/file/23946802829.pdf
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b251e85d70e---80548519301.pdf
- http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f206cd8a00---fuzubasovi.pdf
- http://graphicyazd.com/ckfinder/userfiles/files/82981518677.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_off0000f625.bin73e96dd1d6c883ed2cb90dcda1f52d06094b0a0941203e8c919d62a11bef08fe |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF625 | 11124 bytes |
font_01_sfnt_off00010fcb.bin93d6a3443b4123df362f66da278b7e5bb585bb2f999ef52c6c0eaa04045b25f0 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10FCB | 16784 bytes |
font_02_sfnt_off00013b98.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13B98 | 16792 bytes |
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