Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d93fcdc571693de…

MALICIOUS

PDF

54.0 KB Created: 2021-09-13 03:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 2fe9f36784aa575d6c21965cc0b28451 SHA-1: de15a18f991ff3ab62a8e3a5272ea53dadae74f5 SHA-256: 7d93fcdc571693dedd9295c120cf917808314767c27dbe81fcdd50ebb7a56bb5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated maliciousness. Heuristics identified it as a link farm with numerous links to disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were extracted, the PDF structure and numerous embedded URLs point towards a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6253

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 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 http://train-in-japan.com/images/blog/file/74287155479.pdf In PDF document text
    • http://nayyaralidada.com/alpha/ckfinder/userfiles/files/xosezedupabigetelezunazum.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/zaruva.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/52902945274.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109031558122702.pdfIn PDF document text
    • http://eternaseguros.net/files/files/poleduvilanemirisumak.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/sobuvopirugalesemixabi.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/bapagisas.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/jiwapemovexudobiluba.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/39613275922.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/tofal.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/68178314439.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/23210814335.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/68257914315.pdfIn PDF document text
    • http://zoekidsworld.com/userfiles/file/bibenowubosizugazunafo.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/309023585.pdfIn PDF document text
    • http://firegallery.ru/img/upload/35437746051.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/95357094922.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/73375531901.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/saraxulasig.pdfIn PDF document text
    • https://viadagio.be/userfiles/file/42527348722.pdfIn PDF document text
    • http://wirheiraten.de/images/file/10145121803.pdfIn PDF document text
    • http://alotercuman.com/ckfinder/userfiles/files/99066884411.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/9313062415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=motorola+fastboot+commandsPDF link annotation