Malicious PDF — malware analysis report

Static analysis result for SHA-256 63fc7aaa6c930ce5…

MALICIOUS

PDF

37.3 KB Created: 2021-09-13 23:14:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6fc09b2ac4636bd213e9f05d7c4abcfc SHA-1: 8786dee7752e22c9ff765c2886b4c1f130f716b2 SHA-256: 63fc7aaa6c930ce5ff1d2c06546a75e9e5b6a334d47d62ac3f08b066587fceb0
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 elements. It functions as a link farm, directing users to multiple unknown websites, suggesting an attempt to lead victims to malicious content or further phishing attempts. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

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://novamakine.com/upload/ckfinder/files/77906406544.pdf In PDF document text
    • http://kpghomerepairs.com/uploads/image/files/birapewanolox.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/peloratuxotifapupiz.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/xajufajimel.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/f93fbda17042c2786b30cbe89b05c119/nubazubekogotiradiniweru.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/bdcbe2059db9b1fc7fe8b3f5e8c4c6b9.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090201484273499.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/42549058198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=office+doc+viewerPDF link annotation

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