MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on compromised CMS uploads, suggesting a phishing or SEO poisoning campaign. The document body, though heavily obfuscated, contains text related to 'Entrance exam questions and answers', likely a lure to encourage clicks on the embedded malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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 https://nomylo.ru/uplcv?utm_term=entrance+exam+questions+and+answers PDF link annotation
- http://monkey-do.net/userfiles/file/63094772603.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/1757d190c71fd4b04894ca09be8cc3f2/zoxutiwoxexifuvu.pdfIn PDF document text
- http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22e7d3985d---juribomomawaririlemu.pdfIn PDF document text
- http://dzbnf.com/upload/file/%5C/78054913160.pdfIn PDF document text
- http://bakoca.hu/files/file/vovumudewatikepegam.pdfIn PDF document text
- http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607041e5e8d8e---92698510396.pdfIn PDF document text
- https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160abf60a2f7dc---jevaxagifus.pdfIn PDF document text
- http://adams-gold.ru/archive/image/file/narizulibofeboserakebe.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074cfcdd16df---32121129664.pdfIn PDF document text
- http://birons.net/wp-content/plugins/super-forms/uploads/php/files/c1bfa1c0c9663baa18c93f50a50c716a/robariponiwarudotevofeza.pdfIn PDF document text
- http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bfeda8171---82203195731.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6afc51a934---65354469673.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/79o8s4g1jdifsmhm8b17ka6epp/37957293680.pdfIn PDF document text
- http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/n5rtpagbfllsv4jhp75lg08jq1/40564165076.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f3e9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF3E9 | 5296 bytes |
SHA-256: da473db80a9d2c1c45ead0513f89e49d6949d5bc95e64ad39b095fd4b46f9da2 |
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font_01_sfnt_off000105de.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105DE | 1940 bytes |
SHA-256: 9717c572b491d895217c4e958acc8dae43b5536372e998b1a3c12f26fa080abe |
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font_02_sfnt_off00010f18.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F18 | 11836 bytes |
SHA-256: 75db30e157df0661a80c22240bc6b4b644b052823316165c736e6ce89d99e41b |
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