MALICIOUS
244
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirectors. The primary malicious URL identified is https://yafferge.ru/123, which is flagged as a known malicious redirector. The document's content, though heavily obfuscated, appears to be a lure, likely for phishing or to download further malicious content. The presence of numerous links suggests a link farm designed to distribute malicious content or engage in SEO poisoning.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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://yafferge.ru/123?utm_term=strong+london+grammar+sheet+music+pdf In PDF document text
- https://static.s123-cdn-static.com/uploads/4388065/normal_6006c921553b0.pdfIn PDF document text
- https://cdn.sqhk.co/gusisezepemu/OWjjajd/35892816431.pdfIn PDF document text
- https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/7c3558c70dcd53.pdfIn PDF document text
- https://xupijologa.weebly.com/uploads/1/3/5/3/135327862/vateji.pdfIn PDF document text
- https://wopatozobaw.weebly.com/uploads/1/3/2/6/132682171/gaboliwejimo.pdfIn PDF document text
- https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/1425832.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4423166/normal_60328b9753862.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4490736/normal_600d59397b152.pdfIn PDF document text
- https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/dcaca957f23d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382638/normal_5ff3f24224969.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4365539/normal_603a0598bbe84.pdfIn PDF document text
- https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/8803210.pdfIn PDF document text
- https://biwizodem.weebly.com/uploads/1/3/4/6/134650183/9908719.pdfIn PDF document text
- https://sovonasu.weebly.com/uploads/1/3/1/4/131407222/3672401.pdfIn PDF document text
- https://mavekajokirusap.weebly.com/uploads/1/3/1/4/131437454/kobarexebilumufiruki.pdfIn PDF document text
- https://cdn.sqhk.co/guzoladip/WghhaSN/30369070670.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374364/normal_604fe95f165d2.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/rawesaragegugar/mokajizede.pdfIn PDF document text
- https://s3.amazonaws.com/rojalexipokadaz/korg_sv_1_used.pdfIn PDF document text
- https://s3.amazonaws.com/goneduzum/bsc_nursing_form_document.pdfIn PDF document text
- https://s3.amazonaws.com/nufidibodudulad/82994930536.pdfIn 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_off0000e8b7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE8B7 | 5672 bytes |
SHA-256: 6912c67343f1ca2189a6b44b3d35b8398438a762eb301b90da4f66d4c426f5aa |
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font_01_sfnt_off0000fbde.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBDE | 10748 bytes |
SHA-256: 124f9162d0beb6df376964b76def72d55ea41e5ce9a88e213df0ae09e3e95c73 |
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