MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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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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://zajinet.ru/123?utm_term=b.+d+singh+biotechnology+book+pdf PDF link annotation
- https://milonotupilo.weebly.com/uploads/1/3/5/3/135347339/9466028.pdfIn PDF document text
- https://fokorakadugapo.weebly.com/uploads/1/3/4/4/134444193/puwolopubopajog-boxegekovuvo.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4389582/normal_5fec9cade9e35.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453335/normal_601833ae897f3.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476952/normal_5fec83873e567.pdfIn PDF document text
- https://sijilosak.weebly.com/uploads/1/3/4/4/134476358/6139803.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4451551/normal_5fe0c33cc179b.pdfIn PDF document text
- https://ruzamoga.weebly.com/uploads/1/3/4/7/134761687/6697007.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381098/normal_604ad77969ded.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384301/normal_603e78f863c9a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4477651/normal_60208492491df.pdfIn PDF document text
- https://nujidigazinuwag.weebly.com/uploads/1/3/4/3/134318548/sunopegupexag_lulufetof.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4380237/normal_6045c0564a8f3.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/69c4bd93-d8a0-46d0-bd44-f822cd0cca66/nazalekuxowawunaxa.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/00df693c-0e8e-4216-9794-6391d2e552a3/why_is_my_zebra_printer_blinking_green.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/066e834f-3eed-4e75-988a-5a838240a541/10307913030.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/d50b4391-ad70-4844-997e-ddfb7efc2c05/pitazelazaberaresoliwalu.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/43bcac28-c9b1-4296-af99-9a00b0409e84/xulumupudekavux.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e75f1cd7-6fb6-4ca2-ae1f-9f3f85445cdc/dedowivi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/be9bb80b-9b20-4926-bb06-33f88ace09de/bafip.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_off0000c336.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xC336 | 5500 bytes |
SHA-256: bd659b987156ec81e5343084912d737a9e821c1258cea7752b44071a910a39c4 |
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font_01_sfnt_off0000d606.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD606 | 9976 bytes |
SHA-256: 6c7cf198ca7aee47ddfe54fd8df8c39292e288ca0a1fceecf8e482b91491b574 |
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