Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0fa026afbd2a83…

MALICIOUS

PDF

59.0 KB Created: 2021-04-04 14:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e5c966c0c6afb4ac3f4b4a85e9e2d99 SHA-1: 78457d3a5a0d2fb956f4a2d341932785abe74167 SHA-256: 6f0fa026afbd2a83db58a11ac765db54d5c2e58642d4279541992078a0e1ad34
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9022

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One 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://pelibifir.ru/strik?utm_term=3-6+practice+solving+systems+using+matrices+form+g PDF link annotation
    • https://nerukime.weebly.com/uploads/1/3/1/3/131379394/868af860de7249.pdfIn PDF document text
    • https://kaneloko.weebly.com/uploads/1/3/1/4/131408798/sabonefegiz_migimemubode_bukegonewep_rufunoruvuso.pdfIn PDF document text
    • https://lavolobaned.weebly.com/uploads/1/3/0/7/130740571/manovudoke.pdfIn PDF document text
    • https://gokatejasefe.weebly.com/uploads/1/3/4/6/134650338/nugunewomuje.pdfIn PDF document text
    • https://wikejawuwe.weebly.com/uploads/1/3/1/4/131437941/3019862.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a9d70ef-ff1b-4d0d-ae01-1cbc6a47722c/carta_poder_simple_para_llenar_en_computadora.pdfIn PDF document text
    • https://02314edc-d025-420b-9d62-795437f25c47.filesusr.com/ugd/4f0fc1_911d4c1b650f4c6f81fe826bf7f060a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f616a1a-b5f3-47d2-8a7f-58d7dd7a8dc5/6684842365.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/1081932019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b896c4-3842-44c3-9bf8-6b09340c16af/zokulevepugonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73af8b4e-060b-4e11-a4ae-a17c3e678d59/laws_of_the_game_booklet.pdfIn PDF document text
    • https://19004eff-8f5e-45b0-b15a-9fbdbd99e39d.filesusr.com/ugd/578ea4_124906d99794476dad2fd7718bda3a0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/44929753492.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_ca13a00b3b744799ae0b8f9c7def39b6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb222bb3-e210-4535-9f95-f82a864329d7/organic_chemistry_test.pdfIn PDF document text
    • https://dcc20dec-0195-4543-b617-cfb82efd15f0.filesusr.com/ugd/30ea26_75677642e47242d78a9c4d86cbfac75d.pdf?index=trueIn PDF document text

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