Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64df1eb9f3e6d64…

MALICIOUS

PDF

61.2 KB Created: 2021-06-07 10:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cb3d649e9cd8316c10a8a2c452b45db SHA-1: d9af5ed21e6ac464e17de464e2582ca4eea4a98e SHA-256: d64df1eb9f3e6d64c453e258ac67cf1ed0ea5b5d332cb547edd2b4204092364a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan distribution attempt. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users seeking free PDF content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7109

Heuristics 5

  • 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.
  • 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://queure.ru/uplcv?utm_term=numerologia+22+conny+mendez+pdf+gratis
    • http://ahcxdq.com/uploads/file/012130487872.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a273a18e0e7---70428636198.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/da07e6d172eba0c29fc86167ae97f036/89540806565.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/72fe6982a85fa28f557125c97f642d66/42109607383.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/v7ueg0rev2nhotg2jv6toogdve/xudadil.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kvjvotjp3jbe9ou1di6s0b52t8/62745812184.pdf
    • http://accessiblevehicleservices.com/userfiles/file/48446761536.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b8ffc31cdddf6a1b1b1868db3010d70a/jalinagadopobevula.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/d23f73e99f5e62e644d45b6328c3f6f0/xuvasikojimujitesovem.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/210d5bd86e184fc79c29ea0f211bfb4a/26490735357.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160848fecaef21---45762018909.pdf
    • http://tasteofruraleurope.eu/upload/File/figugaxixow.pdf
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/efd9ac93eb14b6fe299aaf49856f254c/2574635448.pdf
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c35914bd72d05d2744281c5c44d121cd/39291079399.pdf
    • https://btegypt.comfile/69095298473.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6e69e930a9c20b1ff16ce41b7997fc70/38147150194.pdf

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