Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e4c9e8c042f456…

MALICIOUS

PDF

67.6 KB Created: 2020-12-27 08:10:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ab0e735ed728a49e19a152fe86ad5e5b SHA-1: 6969370915d6178999a50ead18c38cd6264aaaed SHA-256: 12e4c9e8c042f456431ef8591efc49ad1a9b3280a9006e6da9117a88d751820c
212 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a known malicious redirector and a link farm, indicating an attempt to direct users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature. The document body, though heavily obfuscated, suggests a lure related to educational content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/aws?utm_term=counterexample+worksheet+with+answers In PDF document text
    • https://dasiwijumajofep.weebly.com/uploads/1/3/0/7/130739595/muwumus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426697/normal_5fdd7a68d8aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419644/normal_5fade490ebb6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5fb6ca3a8e372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_5f980a949ded8.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/hyDQhfX/fowukekevani.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501231/normal_5fcf6f3122153.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/coin_pusher_for_sale_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/rinotupevido.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/android_9_pie_galaxy_s7_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/cahier_de_vacances_maternelle.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/11373658759.pdfIn PDF document text

Related samples 8

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