Qakbot — PDF malware analysis

Static analysis result for SHA-256 9bfcdb28009feeda…

MALICIOUS

PDF

89.2 KB Created: 2023-03-19 19:37:16 +00:00 Authoring application: dompdf 2.0.3 + CPDF
MD5: a9a100403a4d18239c2abb3949bd6c90 SHA-1: 6227adb5d7fd9f5d7b30b1ee51126e8c2af84f03 SHA-256: 9bfcdb28009feeda218c4322dabcc1f6464ce64fdede12c988db36889e77fa2d
82 Risk Score

Malware Insights

Qakbot · confidence 95%

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

The PDF file is identified as an image-only lure, a common phishing technique. It contains a single external URI pointing to 'https://gruastranservis.com/eaoe/eaoe.php'. ClamAV detection confirms this as Pdf.Downloader.Qakbot-9989703-0, strongly suggesting Qakbot family involvement. The primary attack vector is the embedded malicious URL, likely used to download and execute further stages of the malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0537

Heuristics 4

  • ClamAV: Pdf.Downloader.Qakbot-9989703-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Downloader.Qakbot-9989703-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 89 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://gruastranservis.com/eaoe/eaoe.php

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