Malicious PDF — malware analysis report

Static analysis result for SHA-256 950344b3b911459a…

MALICIOUS

PDF

37.6 KB Created: 2021-09-19 06:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 36d925c5a74e4f928648c8343171cb64 SHA-1: 687ec629825b812839063be8d5f98619997ac309 SHA-256: 950344b3b911459a90cb4f0d4cb887b9c2f6df5a9bc8b4696200e7dec734be47
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable links. The embedded URLs, such as 'https://chcial.ru/uplcv?utm_term=indian+cargo+truck+game+download', suggest a phishing attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7887

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 37 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://chcial.ru/uplcv?utm_term=indian+cargo+truck+game+download PDF link annotation
    • http://zs-oilfieldequip.ru/d/files/kinetugalifuvokekuxagep.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/ziwefugetoz.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/b70d1f19ae1748711c5999ce828dd417/supejom.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/pawudafuv.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fed805ca4a---66484890314.pdfIn PDF document text
    • http://jtg-antracyt.pl/files/file/gogin.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/kamevikaxa.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/bewivaxugirazun.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/54523722777.pdfIn PDF document text
    • http://sladkiy-ostrov.ru/userfiles/files/87437421281.pdfIn PDF document text

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