MALICIOUS
244
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a large link farm hosted on disposable infrastructure. The embedded URLs, such as 'https://yafferge.ru/award?keyword=bernoulli+s+equation+pdf+nptel', likely lead to phishing or malware download sites. The ML classifier and ClamAV detection further support its malicious nature, indicating it's designed to redirect users to harmful content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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 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/award?keyword=bernoulli+s+equation+pdf+nptel In PDF document text
- https://perasukene.weebly.com/uploads/1/3/4/6/134644841/4304984.pdfIn PDF document text
- https://revijokatise.weebly.com/uploads/1/3/3/9/133999222/29d1b5725c14.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464067/normal_604e14439b666.pdfIn PDF document text
- https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/4063287.pdfIn PDF document text
- https://gewasulupav.weebly.com/uploads/1/3/0/7/130740056/fa6acca5499fc.pdfIn PDF document text
- https://gozizakodo.weebly.com/uploads/1/3/2/3/132303179/tixefiditatefalekos.pdfIn PDF document text
- https://fobuxowomi.weebly.com/uploads/1/3/4/2/134235628/gisulumuvem.pdfIn PDF document text
- https://xikanunifozale.weebly.com/uploads/1/3/1/8/131860479/19954c7c9.pdfIn PDF document text
- https://gajifawegux.weebly.com/uploads/1/3/4/6/134649352/jesifok.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449616/normal_5fdcbfde7879e.pdfIn PDF document text
- https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/7097553.pdfIn PDF document text
- https://befawiboper.weebly.com/uploads/1/3/5/3/135389238/gilanijokuzor.pdfIn PDF document text
- https://womevelem.weebly.com/uploads/1/3/2/8/132814223/wenojovu-rapowegejixo-gidekis-lasekubupasi.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4467573/normal_5fcd0376bd3b4.pdfIn PDF document text
- https://tipuvativojodud.weebly.com/uploads/1/3/4/7/134754547/xezobunas.pdfIn PDF document text
- https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/3648067.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4416666/normal_5fd68191dfefe.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4393632/normal_6037b0d5892f2.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4487208/normal_60410e4547535.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/db96280d-fe16-41bc-a426-8fc352ed06be/how_to_adjust_husqvarna_carb.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba604e45-59ec-4e76-9167-c97a58dbec68/what_are_the_3_parts_of_social_security.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_off0000eb61.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEB61 | 5212 bytes |
SHA-256: 5cafc266fbe96516285880b6a5d5612c2581f5cdfa72dcdaa8b3f76ec3231149 |
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font_01_sfnt_off0000fd29.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFD29 | 10588 bytes |
SHA-256: 918c0857b9d809a94e56e9f57a314815740ab8968325871e97ffea27c14c598b |
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