MALICIOUS
172
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a malicious PDF, as indicated by ML classification and ClamAV detection. It contains embedded JavaScript and numerous links to external PDFs hosted on compromised websites, suggesting it's part of a phishing campaign. The 'SE_INVOICE_LURE' heuristic further supports the phishing pretext, aiming to trick users into downloading a payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9973
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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Fake invoice / payment lure low SE_INVOICE_LUREDocument contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
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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://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/885ae5e94868ebdf3650ca208a47cb40/65475987215.pdf
- https://gamedunyasi.com/calisma2/files/uploads/1324060241.pdf
- https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3cfc60f30f---43422190662.pdf
- https://comobrew.com/newsite/images/user_uploads/file/zefubu.pdf
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9d1ae1f0b---33971808776.pdf
- http://stoewebdesign.no/userfiles/file/wilakuzu.pdf
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084303520219---77654810032.pdf
- http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47801401f5---97787257509.pdf
- http://mai-colle.jp/userfiles/file/78406598680.pdf
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b750bc6af4a---87354890663.pdf
- https://nusamulticentralestari.com/Uploads/userfiles/files/81863277337.pdf
- https://mariellatriolo.it/public/file/bejawukakatodoj.pdf
- https://surupaceanu.ro/ckfinder/userfiles/files/15367609521.pdf
- http://eros-arena.com/eros/userfiles/file/92773672079.pdf
- http://e-kva.ru/admin/ckfinder/userfiles/files/pituvanas.pdf
- https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608404cba34fd---kavemasodozometar.pdf
- http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b6046bc3510---xufevukuvalesafazilif.pdf
- http://gps-tw.com/CKEdit/upload/files/35493895712.pdf
- http://gunjanjain.com/app/webroot/js/uploads/files/96880027918.pdf
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093a107490a0---44703862308.pdf
- https://tckontrola.hr/files/48308698612.pdf
- http://alliance-ltd.com/userfiles/zebasibifozoxusilijuf.pdf
- http://japhina.com/upload/file/dimipubatuxowo.pdf
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/53842255520.pdf
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=golpe+de+calor+pdf+2019
- 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_off00015974.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15974 | 16792 bytes |
font_01_sfnt_off00017186.bin63243ab918d8478499b0d87bf969b2319ed6333545fd83fa9c46a02c201e8c65 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x17186 | 22304 bytes |
font_02_sfnt_off0001aa4e.bin925b77eac125ac26ccb424496bd062eb6f164be8e4b7894a0c67269c98bb6970 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1AA4E | 10652 bytes |
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