MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF containing embedded JavaScript, which is often used to download and execute malicious payloads. It also features a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious intent.
Machine Learning
- Nyx PDF Classifier malicious score 0.9993
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 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://schmitz.cz/res/file/kugupawuz.pdf
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a775e849ca77ea47da5c70f18446550f/5460254409.pdf
- http://mebelhotel.ru/images/news/file/ximomasenigazulaw.pdf
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607793f0011de---kekanixadosepe.pdf
- https://speakingparrot.com/upload/ckfinder/files/zosulofadarejegifinemig.pdf
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c869cd1bd35---guruzi.pdf
- http://sgyscom.com/upload_fck/file/2021-6-26/20210626031604382320.pdf
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/7ef56c7fa0c9750e3658fb54c689bbc7/jozus.pdf
- http://dongtienlamnghiep.com/upload/file/xubigokun.pdf
- https://konferencii.ru/js/ckfinder/userfiles/files/liginolagaxozubise.pdf
- https://mintedimages.com/ckfinder/userfiles/files/3860728341.pdf
- http://crackershrimp.com/file_media/file_image/file/vovivupukubuposafovus.pdf
- http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/275fd4b682b39b172333f32f7e1db8f8/83277553826.pdf
- http://remproekt-m.ru/admin/ckfinder/userfiles/files/lipezupob.pdf
- https://ludifrance.fr/userfiles/file/31702696391.pdf
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/205e46247bfefa73ae01d51eee77ef1e/muvaxob.pdf
- http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/uauuj9318ivkvi46hvguugku70/38147678310.pdf
- http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/vapav.pdf
- https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/f0c37b03ddbfec0af8516d94a2087985/vutugifisiruwiroxoxududox.pdf
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa09046599---93521720049.pdf
- http://happypalettebnb.com/CKEdit/upload/files/90894681126.pdf
- http://a-aqua.fr/ressource/site-image/files/kozidozokikexija.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=barracuda+message+archiver+outlook+add+in
- 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_off0000f10f.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF10F | 16792 bytes |
font_01_sfnt_off00010926.binc7806fce10f33b78e1a83cbd5a2191bf95ed350ab8df7e85cb646b38b322aaaf |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10926 | 11128 bytes |
font_02_sfnt_off000122cd.bin58ec96d23cea6f1e2d5a2938ab81a512510d0516b98c70875d57397505f5105f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x122CD | 18160 bytes |
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