Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cede7b75e2433f…

MALICIOUS

PDF

48.0 KB Created: 2021-09-20 12:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8df59d3b3defa4f8689463fc35d2eb25 SHA-1: d3fa739dca7bf65db2f4aa64f0f6679f5373ff5a SHA-256: a5cede7b75e2433f7dd6692746ce6f3f0017f0762f8a5996a13d5b101e4dc63a
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags the document as a link farm on disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://infrive.ru/uplcv?utm_term=android+atualiza%C3%A7%C3%A3o+samsung PDF link annotation
    • https://cebubigsellers.com/userfiles/file/sewipeniwoxazowaxufu.pdfIn PDF document text
    • http://datcat.vn/2018/file/fuduxunabimuxowuzaposunow.pdfIn PDF document text
    • http://pnalog.ru/images/file/fuxibobibataz.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/50661198621.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe1a3687c3---gujizofexofudo.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es/ckfinder/userfiles/files/migufemitoxixuzax.pdfIn PDF document text
    • https://tsegypt.com/file/vumuvepomojen.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/fuzidivaduw.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16147e11c75b29---79834459.pdfPDF link annotation

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