Malicious PDF — malware analysis report

Static analysis result for SHA-256 5239414d63eb440c…

MALICIOUS

PDF

48.4 KB Created: 2021-09-02 18:34:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f56dd1bb182cb8e23e9696d110ed45c6 SHA-1: 3f6743c54707e6da416ecfc6531d225a6f7c59f3 SHA-256: 5239414d63eb440cee63a24a6f81223d94f5ac723706a179d5fad21c9339dff1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a likely phishing or malware distribution attempt. The PDF structure and embedded links suggest it is intended to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6409

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 https://wastran.ru/uplcv?utm_term=user+story+mapping+pdf+github PDF link annotation
    • http://rajskiewakacje.pl/userfiles/file/diguparimewakutogezu.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/pogodarenesunupo.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lupesajuxovobi.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/66386925566.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/fumikiwuselo.pdfIn PDF document text
    • http://corising.info/sa_upload/userfiles/file/20210730074657.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ed616f9eb899736f5e370da470002f40/55473168171.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/97713521538.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/davupukibebuduloluj.pdfIn PDF document text
    • https://bwhe.in/ckfinder/userfiles/files/susux.pdfIn PDF document text
    • https://samowar.me/upload/file/45649344626.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/1031957114.pdfIn PDF document text

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