Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f39ade6beef75b6…

MALICIOUS

PDF

39.0 KB Created: 2021-06-03 02:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3d593531e555cbcfce1aff798e44ec52 SHA-1: db9107b7ca39d81c47437adb673d82e0e649952e SHA-256: 6f39ade6beef75b6efce43a4f507b478e4319436eae495b2312965f5a6a988a4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier. It functions as a phishing lure, presenting an image-based interface with a hidden clickable link. The document contains numerous external URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or download further payloads. The presence of multiple distinct hosts and link farms indicates a broad phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7559

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://archism.ru/uplcv?utm_term=le+petit+prince+famous+quotes PDF link annotation
    • http://iwishop.hu/file/80083904187.pdfIn PDF document text
    • http://zae.me/datafiles/file/felekuxixovezakiriruw.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/b9633792b5ce6dd2f3d802d282ea6139/86376677557.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b26d3705---pijufovodopilimolatu.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/40270738538.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/jinakubi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e6b3b7b1---60614521027.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210502005421774663324.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c6679d19---637072966.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/789d8033421ac90545a1f3e871e7408c/39913476509.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/julipalile.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17312bd5c1---wodudikube.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/719a6ba90cf43c2af69c3f2cf828ba53/kidodesi.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/2pchjri2ob434k3j4grb4d6ai6/dexaxopupuxi.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf97d38683---xilogerefaj.pdfIn PDF document text

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