Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b12d9ac58b5af1…

MALICIOUS

PDF

67.6 KB Created: 2021-01-11 23:20:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a986bb4853933f4d59a1d4b41e5aa09b SHA-1: eeb77aa6174643a5bee289aff85a39cec8ed92f3 SHA-256: e9b12d9ac58b5af1b7989ac99bb6ea2f3f9d7869c0299b9c24e0c482b4ea5847
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8846

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://traffset.ru/aws?utm_term=bearing+nomenclature+pdf PDF link annotation
    • https://cdn.sqhk.co/nabaxifow/aD8DjeD/train_driving_simulator_game_download_uptodown.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/6110408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f9a8af343b12.pdfIn PDF document text
    • https://nuwoveforu.weebly.com/uploads/1/3/4/0/134099073/8205188.pdfIn PDF document text
    • https://site-1175480.mozfiles.com/files/1175480/prodigy_math_game_login_teacher.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465565/normal_5ff249b2b9dd9.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/fuvogogusagugo_waritep_pomaxusuvav_fepuve.pdfIn PDF document text
    • https://site-1178836.mozfiles.com/files/1178836/lejidogesimogize.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/0a371f517397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_5fb2cbaff0502.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/tadozepajiwivegiwabarapo.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/nigexabevapigalapiso.pdfIn PDF document text

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