Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1f73a924a8d410c…

MALICIOUS

PDF

41.7 KB Created: 2021-09-26 18:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ecf22150ff7548d6e1f38aa1dc26bb89 SHA-1: fed4eb8d4e3a9fcfbb676e0a4e2c4e1088601d3b SHA-256: a1f73a924a8d410caafd039db6d1d6e4353864121db63d9fd3a1f865f5a744b2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and is flagged by ML classifiers and ClamAV as malicious. It also exhibits characteristics of a phishing lure, using an image-based design with a clickable action to redirect users to external URLs. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download further payloads or facilitate exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8315

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://catamma.ru/uplcv?utm_term=st+thomas+anglican PDF link annotation
    • https://emenu.hu/editor_up/99090918011.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/9f13e6a9fc290f27b90f4958cf58fc02/36799787361.pdfIn PDF document text
    • http://czechnews.cz/userfiles/files/2664900113.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/winewov.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/8e9d93317920c115185f65f4ec10759c/vonolofizixivajujet.pdfIn PDF document text
    • http://bakoca.hu/files/file/181974230.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/vozekixukivefawowodexijof.pdfIn PDF document text
    • https://panama4d.com/contents/files/11623095121.pdfIn PDF document text
    • https://dptech.vn/uploads/files/kovog.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/11924358340.pdfIn PDF document text
    • http://gzbaosui.com/uploadfile/files/61188788893.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/61656349081.pdfIn PDF document text
    • https://jjcfurnituremaker.com/userfiles/files/gigepepiguxekazapotuluw.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/wazijoluwo.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/menunuvudibebexagatanev.pdfIn PDF document text
    • http://geodez.com/pliki/file/95832712848.pdfIn PDF document text
    • http://meskerjager.nl/media/files/gujube.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/raridadamabisobojufosar.pdfIn PDF document text
    • http://dlevitin.ru/fck_editor_files/files/55622107567.pdfIn PDF document text
    • https://advik.net/userfiles/file/8658606278.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/56855379634.pdfIn PDF document text
    • http://cocoon-soIn PDF document text
    • https://mediaget.com/userfiles/files/vuzaxivogibozuzu.pdfIn PDF document text

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