Malicious PDF — malware analysis report

Static analysis result for SHA-256 619a651fae72fdcb…

MALICIOUS

PDF

39.0 KB Created: 2021-06-13 19:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ac5cdc9567cff074ff684f2a27e4bf78 SHA-1: ed4c2d989e793d747e303d8d8559aed880c18a37 SHA-256: 619a651fae72fdcbb935130e2da78c02ecddcdab126904ab219256ea839ffc4c
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV flagging it as a phishing trojan. The PDF appears to be an image-only lure, typical of phishing campaigns, designed to trick users into clicking embedded links. These links lead to various compromised websites and disposable hosting, suggesting an attempt to distribute further malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external URIs indicates a strong likelihood of redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7452

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://inwebjor.ru/uplcv?utm_term=canon+in+c+piano+sheet+george+winston PDF link annotation
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/73531247497.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3128bf02d8---kitapewekosabuz.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077b85ad404b---43743139164.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/89838171722.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/24685175416.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/906500f8e058937bbc8bdb0830055406/bidomofopow.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607de9c7c4a7c---39815404791.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f11e30525c---73401080858.pdfIn PDF document text
    • http://muszempilla.com/files/file/bofazoxowujuvuwuxixufod.pdfIn PDF document text
    • https://kopari.hu/files/file/76225841476.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/09k3tm5if6bvcusecpr203ndt2/fozavekefikapimufesewej.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff188055cd---42840105551.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/utbcl7et1jtqal6jh0fnamrr43/nuxobuzezo.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725af7dcca9---tegukumuropuxabenimijowu.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/qv2u5kkvpue53ddpi3u09n3fbo/womafijewukoj.pdfIn PDF document text

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