Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77a174d6dcfadc3…

MALICIOUS

PDF

44.8 KB Created: 2021-09-21 00:37:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 444c043775518b9a5bc3c6c3b15405d4 SHA-1: 142c1e19e1a41817bfe3a537d9d24a05fe5bcaf4 SHA-256: c77a174d6dcfadc36bad1dfa90e5d97d0475d847f9c50f82e453b56a6da665a6
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier flagging indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly leveraging JavaScript for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://oniceh.ru/uplcv?utm_term=galaxy+s6+reset+button PDF link annotation
    • http://asea-admin.com/_userfiles/file/20210908065839.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/93700806124.pdfIn PDF document text
    • http://grandp.ru/userfiles/file/fipixanonibetitoxovofoz.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/99774429305.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/17973634421.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/27315425921.pdfIn PDF document text
    • https://www.willmarshelter.com/ckfinder/userfiles/files/81259603917.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/xogeferovuf.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/77286086970.pdfIn PDF document text
    • http://santehnika34.ru/images/file/dugerojizej.pdfIn PDF document text
    • http://xszhuhai.com/uploadfiles/files/vemigemefosekimisotira.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/27510752741.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/22640025229.pdfIn PDF document text
    • http://dakmoto.cz/obrazky/file/kituvuwimujijes.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/16137b4992e0ef---44424138409.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d698227b2e8238861df2e993a5f7ae6/zapibode.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/bevifusepovo.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/rakaxitujanaxolowisalipe.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/jewuzagevefiko.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a891996d4f---51625073248.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/79750200048.pdfIn PDF document text
    • http://fatimaartwork.com/userfiles/file/tofasomomonulodida.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/rodof.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/6796476913.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/23900414735.pdfIn PDF document text

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