MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The sample is a PDF file detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous external URIs pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content disguised as a textbook. The PDF structure and embedded links indicate a link farm designed to host and distribute further malicious payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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 https://inwebjor.ru/uplcv?utm_term=pearson+algebra+1+common+core+textbook+pdf PDF link annotation
- https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/h7hugn3f424f9n863f43d6for5/81734811654.pdfIn PDF document text
- https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/792a6ee2dafa598942e98ccfd5f51536/wopuganux.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094bd59b2e8d---tewosidijibalonaj.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/laqg941jr2fg7a3gul6seretv6/2777715595.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e61cc1789457fc7c7b2c30bc0e17456c/lalitawitusip.pdfIn PDF document text
- https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3ed199f566---dazazebejirasuzoz.pdfIn PDF document text
- http://seventyfirstclassof69.com/clients/60772/File/kevulidevosakibokitirerub.pdfIn PDF document text
- http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/03aofbcsmkr046qbi3kfboj6e3/38550342243.pdfIn PDF document text
- http://archi1919.com/smlclub-files/file/sujetajudu.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1105572781---3773303084.pdfIn PDF document text
- https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cbb7bf77b---rikane.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/sl213kqe7t612tbiv5a0b6oh35/safomovaruka.pdfIn PDF document text
- https://lentes123.com/aym_image/files/lobeji.pdfIn PDF document text
- https://pepinieramontana.ro/ckfinder/userfiles/files/refovuseranewivane.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a822a17e5b5---57257055159.pdfIn PDF document text
- http://spadhotel.com/basefile/spadhotelcom/files/segetikudiraleditilikam.pdfIn PDF document text
- https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/lmvb5qbhtr2snhio41pe0d3trs/vuworiweludipuzawafowubo.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e57b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE57B | 5800 bytes |
SHA-256: 594a2aee8def632f1828b7d5f4d49b5aaefab262f30fa0f0ae83be6119694640 |
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font_01_sfnt_off0000f92c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF92C | 11220 bytes |
SHA-256: a3455857fc78761c8c8ee313aecd2289f94472ce703d6d2b81b6422bd1a7741c |
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