Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdf7113814df083…

MALICIOUS

PDF

49.8 KB Created: 2021-10-07 06:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4ad7ee5a3e05a19709b0e760b260a31a SHA-1: 7cdc5ca7c9ae69d9725c544f173559d80c84fa26 SHA-256: 1cdf7113814df08346703a682033fe72361acea2868be87f232e527aa7ada97b
124 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host many links on potentially untrustworthy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7015

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://irlanc.ru/uplcv?utm_term=example+of+handbooks+and+manuals PDF link annotation
    • http://tydafa.com/dafa/uploadfiles/20211003153808.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614ecdc61c8fb---51680572337.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/nubalavusefopoxupazujaweb.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137553e1d6a6---rigapezewi.pdfIn PDF document text
    • http://orsini-blasioli.it/userfiles/files/44062468772.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/38705268702.pdfIn PDF document text
    • https://widepolymers.com/userfiles/file/71081922845.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/fojutiginutel.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/18358106439.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/bexugovufagevejawupizo.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/98423456181.pdfIn PDF document text
    • http://ihdbd.org/upload/files/tidamusaxiremugelij.pdfIn PDF document text
    • http://apex-architect.ru/images/file/10161128108.pdfIn PDF document text
    • https://ms1oke.com/contents/files/suladoxot.pdfIn PDF document text
    • https://kristinanamaste.eu/files/56400784650.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/77086434745.pdfIn PDF document text

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