Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58b94eb8e32382f…

MALICIOUS

PDF

87.3 KB Created: 2021-03-20 18:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6827a8ffb0b372cb8470f6884630706 SHA-1: 7313406bbaf59a0b6258e12005092bff750291eb SHA-256: c58b94eb8e32382f6f0d349d1988706e5f684da5d6ca70ce8a07b8e5a930aa2b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with link farming and potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or redirecting users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit user trust and lead them to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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://botokaw.ru/award?keyword=ophthalmic+lenses+availability+pdf
    • https://cdn-cms.f-static.net/uploads/4366961/normal_604cd7340b4c6.pdf
    • https://cdn.sqhk.co/tovizabep/hviLOUh/10712890887.pdf
    • https://static.s123-cdn-static.com/uploads/4485695/normal_5fef36ce0e107.pdf
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fcd98d375065.pdf
    • http://xunibilomo.22web.org/bharathiar_university_bba_syllabus.pdf
    • http://bagomebefekixob.getenjoyment.net/83085571462.pdf
    • https://static.s123-cdn-static.com/uploads/4386363/normal_5fedc5a90f06e.pdf
    • http://pagavopalubutu.scienceontheweb.net/3408527494.pdf
    • https://cdn-cms.f-static.net/uploads/4501991/normal_603b99cf1f0bb.pdf
    • https://cdn.sqhk.co/xejadukoxeta/xjbic8Y/1603919895.pdf
    • https://cdn-cms.f-static.net/uploads/4420020/normal_60465cd01b412.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/circle_geometry_worksheets_grade_10.pdf
    • http://garuwefusu.epizy.com/xezuxufofok.pdf
    • http://fevasakexelima.epizy.com/2330469049.pdf
    • https://s3.amazonaws.com/vuliwisuwig/33295287524.pdf
    • https://s3.amazonaws.com/jidagafinuxesu/61954779855.pdf
    • https://s3.amazonaws.com/godewumazek/fmea_example.pdf
    • http://kiwozoma.epizy.com/cookiezi_skin_osu.pdf
    • http://wopapaxepesibad.epizy.com/electrocardiograma_lectura.pdf
    • https://s3.amazonaws.com/wixanarer/3208473461.pdf

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