Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e40c3ef3a6cc922…

MALICIOUS

PDF

51.6 KB Created: 2021-01-28 12:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b634066fe9c8da939d21645ec6b7411e SHA-1: e6170ea32428c5ecf7c8f899d4647d79f9605c21 SHA-256: 9e40c3ef3a6cc922a46a5a67bc75e7913b771de34e80b6f2833baffd0e990e25
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://jottigo.ru/aws?utm_term=faringoamigdalitis+bacteriana+pdf', is directly associated with the document's content and likely serves as a lure. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7510

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/aws?utm_term=faringoamigdalitis+bacteriana+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fda6c879dd9d.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/gcAgcQx/mitolafok.pdfIn PDF document text
    • https://zameleto.weebly.com/uploads/1/3/4/0/134042643/masilusizelivob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5fd91da67df73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473359/normal_5fee7dad7c03b.pdfIn PDF document text
    • https://rodelifefi.weebly.com/uploads/1/3/0/7/130776661/236bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_5fd1eacc92038.pdfIn PDF document text
    • https://cdn.sqhk.co/xoguvamev/gLmhfxY/33316092310.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/namijezumowuloji.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/ps2_games_for_pc_highly_compressed.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/wumew.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/kiki_camarena_autopsy_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/sagamawikezukomodan.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/wodasiwotiwabovagufax.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/xasam.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/pitel.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/merubah_file_ke_jpg_online.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/pop_up_art_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/32302417989.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/88268018746.pdfIn PDF document text

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