Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9e53231fef1c5a…

MALICIOUS

PDF

37.5 KB Created: 2021-09-06 20:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 996c243c6f99ac1eb3c326154369c3a0 SHA-1: a7cbaeb008d85d5ca683070137d3d8abd63868d1 SHA-256: 4e9e53231fef1c5a13aea3a456aa9395a1174d852a94e4e54b1eed505abfde93
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7773

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fed35bc76ce---41793392771.pdf In PDF document text
    • http://santeh.md/img/files/duvanizawuzakoro.pdfIn PDF document text
    • https://qnzar.com/files/91832318934.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/36216090423.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/26130552311.pdfIn PDF document text
    • https://stvorki.ru/files/file/wudifokefexudi.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/0e280e259ac1cc7fabac36531ba8df43/seroruvakupiwamanakaxojuf.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/roxetedukoj.pdfIn PDF document text
    • http://galluccifaibano.it/userfiles/file/bobutatibulisuv.pdfIn PDF document text
    • https://deepankarbasu.com/FCKeditor/file/zerabafadusikuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=berlin+map+pdf+freePDF link annotation

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