MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was identified as malicious by both ClamAV and an ML classifier. It functions as a link farm, containing numerous external URIs, with a primary suspicious URL being https://infrive.ru/pbw?utm_term=curse+of+the+starving+class+script+pdf. The heuristic PDF_SEO_LINK_FARM indicates a mass of external links, suggesting a potential SEO manipulation scheme or a distribution point for further malicious content. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or malware distribution vector, likely delivered as a spearphishing attachment.
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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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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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://infrive.ru/pbw?utm_term=curse+of+the+starving+class+script+pdf PDF link annotation
- https://fifukufilixo.weebly.com/uploads/1/3/4/3/134371604/gekurinusal_maninitovitato_nofajek_nadapog.pdfIn PDF document text
- https://zewelujipe.weebly.com/uploads/1/3/4/8/134846298/162885.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4378405/normal_601a1c376b435.pdfIn PDF document text
- https://welajewovire.weebly.com/uploads/1/3/3/9/133999455/da01c4.pdfIn PDF document text
- https://wemowojek.weebly.com/uploads/1/3/5/9/135993501/7948296.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407086/normal_60469d1bbce99.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369309/normal_601245717b432.pdfIn PDF document text
- https://tulixepatezapik.weebly.com/uploads/1/3/4/9/134902644/zazonawasu.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/35301c85-532b-4830-86a9-2ef72e18c30e/gutoxolulepemojoforale.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d3492900-4aef-4d72-9fba-c9fbf05f3c8c/80404903448.pdfIn PDF document text
- http://watapabipos.pbworks.com/f/bible_dingbats_with_answers.pdfIn PDF document text
- http://wikoborumun.pbworks.com/f/what_is_nike_current_distribution_strategy.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8362bee4-cc89-49c0-b238-d18dee70d40b/sapewedagulefuweso.pdfIn PDF document text
- http://fupimogevif.pbworks.com/w/file/fetch/144727182/25487941753.pdfIn PDF document text
- http://goxuluk.pbworks.com/f/84571616083.pdfIn PDF document text
- http://bijinim.pbworks.com/w/file/fetch/144592689/3879118121.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d804afff-b1de-4464-85d5-02db604d48c3/lovizel.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97d6a7e5-a72b-4ea7-bbb6-68938bfad4d7/pinguino_air_conditioner_costco_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/dd3f69e7-678d-4475-9184-5812c8dad807/lofetafolamopogutobazi.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_off0000e4d6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4D6 | 5384 bytes |
SHA-256: 16a0524cc30a3c3005e72793f9ed64c2f42fbd0b8abf993a76c3db38e3e41497 |
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font_01_sfnt_off0000f727.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF727 | 10660 bytes |
SHA-256: dabd3c21e3f44cf4118d2db090e9f437f035a9be11740a931fc89e5720b5df3e |
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