Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1882e147a68e4a…

MALICIOUS

PDF

59.3 KB Created: 2021-03-02 00:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c17582240da949e771fa2d17b8e8cc1e SHA-1: b18ee40d3f66ea8bbf6d90a036b87eb595c94156 SHA-256: ad1882e147a68e4a50537f9b9557d8fa54548ec7bb77fd300f656d79c027ada9
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many hosted on disposable domains, designed to create a link farm. The embedded URL suggests a lure for downloading drivers, likely a pretext for delivering malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9332

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small 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.
  • 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://midufefew.ru/strik?utm_term=driver+hp+photosmart+c5280+all-in-one+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4483336/normal_5fd93e1b4b4e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453344/normal_5fc773744f1d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500429/normal_60338b877977d.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/javajexonuzotunodep.pdfIn PDF document text
    • https://gomosonu.weebly.com/uploads/1/3/2/7/132712120/zorufaziwa_jajudukil_novug_rowid.pdfIn PDF document text
    • http://goodnaturak.space/84125297226nk76y.pdfIn PDF document text
    • http://teachersaid.fun/project_cost_analysis_template_in_excelfy3kv.pdfIn PDF document text
    • https://kaposabebozof.weebly.com/uploads/1/3/4/4/134466843/2691350f9e64.pdfIn PDF document text
    • http://fruct.space/worgen_druid_colors2cygp.pdfIn PDF document text
    • http://eurostore.info/venn_diagram_template_with_linessqvmi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_600b272e46207.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450345/normal_5fc92056a1918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379854/normal_5fcda1177cf0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379045/normal_5fdc670a6c886.pdfIn PDF document text

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