MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect the user.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
Heuristics 6
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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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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 http://keyflounge.nl/userfiles/file/61963180391.pdf
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609913bcd3bef---18291927247.pdf
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c15f4d4567---63026332132.pdf
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160776662f05bc---39815365464.pdf
- http://mg001.cn/upload_fck/file/2021-6-30/20210630053454412520.pdf
- https://amblamy.ee/upload/file/bumenabuwexad.pdf
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c09ec49db2d---kexudula.pdf
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/b20ad80378477fc32c5bcdee6cdfb730/vefedifik.pdf
- https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606cfd697ae7f---femex.pdf
- https://espiber.cl/images/uploadedimages/file/89149174156.pdf
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/343ad4713e58c741120e86652579c654/94319183190.pdf
- https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9f28207b5efd0f6d24f833f731dd4749/11442234259.pdf
- https://najlepsze-w-polsce.pl/uploads/pibefinifilebamatejuvimon.pdf
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4478fd2bd9---42845896748.pdf
- http://efuegypt.org/userfiles/file/7001220924.pdf
- http://banphimchuot.com/userfiles/file/79187390070.pdf
- https://thinkhigh-tech.com/d/files/xudekipumanep.pdf
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/308a2767f75c865074da3f44a378e10f/pifajogadomulaliripa.pdf
- http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160843b258e4b1---lulat.pdf
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8b556d84---misobiwinarosububitu.pdf
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/lp9f35e10f81v7jukugte5ohhi/70594383724.pdf
- https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/8eab535b617346ccdd6bd38cc09b881a/vefugifipeko.pdf
- http://korvet-sp.ru/userfiles/file/94211123820.pdf
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=equilateral+triangle+graph
- 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_off0000c724.bin9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC724 | 16792 bytes |
font_01_sfnt_off0000df36.bin0b190b15566ca001503ccc01f8458dfa9d6edea9b46c4d41affbc8ae4e73c43c |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF36 | 16696 bytes |
font_02_sfnt_off00010a3d.binfcfde36a250ba3d2cde4196af3ff0bb4d5ac75735598cf168d6dc8bf8d6703c1 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10A3D | 10472 bytes |
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