Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8a7954bcfd395f…

MALICIOUS

PDF

94.3 KB Created: 2021-10-04 23:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e13eaed2ac0a35cf4007a7131385a18d SHA-1: 180aed9fa20d90d937913e145d78cf83fe362b0d SHA-256: bf8a7954bcfd395fa2cdea72cd195d490d35c9417e5244ecbf363f53632b9645
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, including links to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution by masquerading as a movie download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5238

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://synerhu.ru/uplcv?utm_term=conjuring+full+movie+download+in+english PDF link annotation
    • https://www.thic.net/plugin/ce1/ckfinder/userfiles/files/42055899964.pdfIn PDF document text
    • http://santabruna.cl/upload/file/detijike.pdfIn PDF document text
    • http://zatuchlina.cz/upload/file/28042256522.pdfIn PDF document text
    • http://willowslakerhea.org/userimages/sajamebojulomovum.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/pomegono.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/garixe.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/bibatiz.pdfIn PDF document text
    • https://trompis-tondschungel.de/userfiles/file/lowuzojereraga.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/zakuwiniruvigimip.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159f315f0f31---83968101038.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/pozizeka.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/lekawabogageteniwarizarod.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/lezezakironexuzixasitu.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb8baac4e---vedupepuwuvana.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/d8a45604683ba56f6cc2bbebc178ce2b/88159628437.pdfIn PDF document text
    • http://agrion.org/upload/fichier/famonizariganu.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/gamitalilamiruzumokoj.pdfIn PDF document text
    • http://dkind.net/userData/board/file/8259817336.pdfIn PDF document text
    • http://sushiyaslo.com/uploads/files/15636117148.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/vaginodifimelu.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/zaxejekigusi.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/manegisuvejusavi.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/zimamuxexufi.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/fupopajagagitisarudakanes.pdfIn PDF document text

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