Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20148bf827728f0…

MALICIOUS

PDF

41.4 KB Created: 2021-09-16 04:10:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ff3ba11a48e32bae3100aadbc735c411 SHA-1: 3109611599a7fb13f32df38e98010672a7f8119c SHA-256: c20148bf827728f039446668c6db9eb3843dcb99d79edd0313e93a54ca77fc50
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The document is image-heavy with minimal text, typical for a screenshot-based attack designed to trick users into clicking embedded links. The presence of numerous unknown URLs suggests a link farm or redirection mechanism to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7634

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
  • 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 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://tsolisp.com/files/file/99837012459.pdf In PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/35488788576.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/pebipegijofepowewekifo.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/lemukoxokopazon.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/mologegexan.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/sagubovokotezemexorofune.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/49004138206.pdfIn PDF document text
    • http://tapestry.cz/images/file/files/vomajopuvufezefasetenisa.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/54714166542.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/mejuzovi.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/65805804195.pdfIn PDF document text
    • http://kprmk.pl/userfiles/file/74650207751.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/nesazisaxofawazol.pdfIn PDF document text
    • http://gyuco.com/uploadfile/files/20210914_140443.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/ronoxukejukebupevuz.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/werukudakat.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3f25f2286---13214650171.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/jaxuzolaxa.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/62281474172.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/87910142962.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/zonevuxekikogogamop.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/sajogoluvowadijaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=apps+to+record+songs+with+karaokePDF link annotation

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