Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8889488b84bbb1…

MALICIOUS

PDF

38.9 KB Created: 2021-07-09 06:26:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2bcafa6ed027ceb8c695912f0d322eaa SHA-1: 6cf0585398c140c8e18e41df56a49106a23d8e8f SHA-256: 2f8889488b84bbb16bf7277dc130a083716cbbb06921cf598626f43f1e75ac3b
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a phishing lure, presenting a screenshot to obscure clickable links. These links lead to compromised websites, likely to host further malicious content or initiate downloads. The presence of numerous external URIs and the PDF structure strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

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 38 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=maximum+rock+and+roll PDF link annotation
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/69745999863.pdfIn PDF document text
    • http://cka-shiba.com/ckfinder/userfiles/files/nanizumi.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4af761fa3---89321010406.pdfIn PDF document text
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd3834fb85---kupapixajulijajabu.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/7879007979.pdfIn PDF document text
    • http://amdind.com/userfiles/file/74802951581.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/21451656180.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0e2e3105e9eb1ea1e3aed1f94269ba9e/fodumerunugiketifuwiwu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/44891e38d3f216f4dfce8a3238d696b4/tovixidotetulowonoxude.pdfIn PDF document text
    • https://serini-cloud.pl/uploads/editor/file/demozoz.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/latepig.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/bejumoxuxakulotiwu.pdfIn PDF document text
    • http://belgium-ex.com/images/blog//file/43835268529.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/72207260947.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073bca7bf876---34468358936.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/0fc363bIn PDF document text

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