Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef957bc09d1c6fa…

MALICIOUS

PDF

113.4 KB Created: 2021-06-12 12:08:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c57ff11bebfd4bab53c901ff845d04b4 SHA-1: 8d6cc8a9fcc2b8e6e349024970c6a636c86925ae SHA-256: 1ef957bc09d1c6fab1af34fae41c1637a3a09b785654871fe6b47f713f68d339
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, with a primary external URI pointing to 'https://wastran.ru/pbw?utm_term=sao+light+novel+pdf'. Heuristics indicate this PDF is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6490

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/pbw?utm_term=sao+light+novel+pdf PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4376856/normal_60b26fa9444c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456985/normal_5fec5464d1a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_6043ebee6f04d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_5fe804b09be3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475571/normal_5fd378a7a70db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479254/normal_5fe385022116f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_605676f196b3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420245/normal_5feffb8849a65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_6064c117d0d47.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365638/normal_5fede9711e7e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_6034234c08467.pdfIn PDF document text
    • http://bevojoluvu.pbworks.com/w/file/fetch/144782205/magutesobazipokenun.pdfIn PDF document text
    • http://wenuveraroto.pbworks.com/w/file/fetch/144652293/58162176814.pdfIn PDF document text
    • http://lawerusemepe.pbworks.com/w/file/fetch/145162050/bezamopozugo.pdfIn PDF document text
    • http://finepade.pbworks.com/f/how_to_get_the_hacked_version_of_battle_cats.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144700497/what_are_the_symbols_in_a_circuit_diagram.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/w/file/fetch/145168875/compress_online_free_100kb.pdfIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144517506/job_description_of_an_administrative_assistant_in_construction.pdfIn PDF document text
    • http://mepetibewo.pbworks.com/f/v_songs_download_mp4_telugu.pdfIn PDF document text
    • http://ximusutoj.pbworks.com/f/nacht_der_untoten_doll_locations.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/w/file/fetch/144442845/freeman_dyson_libros.pdfIn PDF document text