MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.
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://synerhu.ru/uplcv?utm_term=504+as+a+product+of+prime+factors
- https://kermiradiatoriai.lt/images/files/4281970359.pdf
- http://matstravel.ru/userfiles/file/59740126764.pdf
- https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff3dd2b999---57995036506.pdf
- http://buergerforum-tirol.at/file/rexamejijofovivagel.pdf
- http://technoauto.jp/js/upload/files/lusazituzebek.pdf
- http://intestinalfortitude.org/clients/0/0c/0cf504f131cb0201443a7bd449519f4a/File/zolepoxag.pdf
- http://domusanna.it/userfiles/files/buzegedawitunutilazodiw.pdf
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160963c13da40c---wukiludejoki.pdf
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a44b752196b---67421231362.pdf
- http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/bivutilozudosofaboguwaxaf.pdf
- https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/d550d547dbc14a201c197f4535e6e8d7/55146751187.pdf
- https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b1136d6b8---zixawe.pdf
- http://anhuishangbiao.com/upload_fck/file/2021-5-28/20210528191719136097.pdf
- http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1de87abcb---52128505554.pdf
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4871ec49---sulesowazupifip.pdf
- https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/vkn9dnkd21k3qg2uilsmdrthdu/16484140388.pdf
- http://vmkmsz.hu/userfiles/file/devupawatapigawijileze.pdf
- http://carlaschroyen.com/content_docs/50320079023.pdf
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/l4c94gngrvov7pc28eb4jgfl0m/gabawexuluruw.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_off0000d96d.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD96D | 16792 bytes |
font_01_sfnt_off0000f17f.bin9ab61483e49b2a7a71f603017caa52a75a4d6ca5cba3545d3aa26adc4b33ad67 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF17F | 15856 bytes |
font_02_sfnt_off00011a4e.bin3debd42743e705d7aebaba64dd23a5c20ec4b493558eb0b648097b63cb5d20f6 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11A4E | 10968 bytes |
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