MALICIOUS
176
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or manipulate search engine results. The 'SE_CALLBACK_LURE' heuristic indicates a potential phishing or tech-support scam pretext, although the document body was unreadable.
Machine Learning
- Nyx PDF Classifier malicious score 0.9961
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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Callback phishing phone lure medium SE_CALLBACK_LUREDocument asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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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://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/1aipdn86qef41g13l4v3pr7gk2/jomalanexizemuwowikimena.pdf
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/f124265f9630c6eb2e2057be2affe54e/28952969175.pdf
- https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2fe521091570d15b3b31bcda6db70fe2/47967005997.pdf
- http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16209090408188.pdf
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e5e239b14---retapijitalozof.pdf
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/bj2v0gacsp8j8nllk138mn0l07/76667946546.pdf
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3c5ed8964---89247376976.pdf
- https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/d047bb30a6c9e163fcdb2a9ebf58b4b8/83560189501.pdf
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607712f95a8e6---59163161374.pdf
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16076a5787df3f---70134075220.pdf
- http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc3f5be7098---sanivibure.pdf
- http://datev.hu/ckfinder/userfiles/files/53951421619.pdf
- http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1bbc34df4e---sijedegujawobetimunumow.pdf
- https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/fb81e23a75936f4b9dabec990f84686c/vepebomiwepanenabopovol.pdf
- http://beergolfers.com/blog/images/file/70100809188.pdf
- http://tort-art.ru/userfiles/file/89172576831.pdf
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b053e00f5---4499452111.pdf
- https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/b06173c0245d277cc73657b59d7d1461/89950853295.pdf
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a9798684a32---53648454019.pdf
- http://ascensionchina.com/userfiles/file/10223064260.pdf
- https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/i8l41jk0s6dksti0gct2odeluk/96492873875.pdf
- https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe2c56e42b---kulegilenazugirapuxi.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=development+of+chick+embryo+ppt
- 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_off0000f898.bin8c29276c2b8065e068c77ed7e39cee7515fdedc0ebc7b00f7094c77880c4045f |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF898 | 10828 bytes |
font_01_sfnt_off00011120.bin180249068107048b31642c4f9bdc34f4edcdedab6c9464b437639ee1516fe3be |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11120 | 16640 bytes |
font_02_sfnt_off00013c34.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13C34 | 16792 bytes |
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