Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb8fb89e82ddec8…

MALICIOUS

PDF

53.1 KB Created: 2021-03-10 20:11:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: caa373b010f1deb0928a259b90ec1d2b SHA-1: d72d4a2ef565525fe8e1113c50e90817495cd881 SHA-256: 5cb8fb89e82ddec8c80f2db45e4088ba868ae649682d898b3df44072f6dd0388
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. The embedded URLs and the ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and external links point towards a common tactic of luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6648

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://jumiwimov.ru/award?keyword=english+vocabulary+in+use+advanced+third+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407804/normal_6046dddbc1a33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484364/normal_5fd7608124a17.pdfIn PDF document text
    • http://libralab.digital/83410789565x5juo.pdfIn PDF document text
    • https://cdn.sqhk.co/tekuzorumuji/ijAx69g/34804850940.pdfIn PDF document text
    • http://starconflict-game.ru/93194232139fh5yd.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/gyhihih/alien_apocalypse_movies_on_netflix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404523/normal_5fded590c0718.pdfIn PDF document text
    • https://cdn.sqhk.co/goxejake/vhbAb5H/standard_enthalpy_of_formation_questions_and_answers.pdfIn PDF document text
    • http://magnifioco.site/dapibibojiluseronarasjah4g.pdfIn PDF document text
    • http://thedefenseforge.com/acoustic_guitar_lessons_online_free32jws.pdfIn PDF document text
    • http://myimperfectmomlife.com/yanni_nightingale_sheet_musict11ns.pdfIn PDF document text
    • https://cdn.sqhk.co/fusozuwalas/VhfZ7hh/movie_quotes_funny_disney.pdfIn PDF document text
    • http://osmosiotzs.fun/hungry_shark_evolution_dinheiro_infinito_apkw0wwv.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/49209120634.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/sample_email_format_for_sending_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/17478288750.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/verbos_irregulares_en_ingles_del_pasado_simple.pdfIn PDF document text

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