Qakbot — PDF malware analysis

Static analysis result for SHA-256 bebf0dbfc471717f…

MALICIOUS

PDF

89.7 KB Created: 2023-01-16 03:01:46 +00:00 Authoring application: dompdf 2.0.3 + CPDF
MD5: ba049609fcc9b473cfb00a21fda46a3c SHA-1: 72205dfacbef24a74f9be749bfa79f98a1b4cbd7 SHA-256: bebf0dbfc471717f27ff0a0ecbd591efdcdc6ed84e92380ef98284785c0e5750
82 Risk Score

Malware Insights

Qakbot · confidence 95%

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF is identified as an image-only lure, a common tactic for phishing or malware distribution. ClamAV detection confirms it as Pdf.Downloader.Qakbot, indicating a downloader for the Qakbot family. The embedded URL is likely the next stage in the attack chain, serving malicious content.

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://howtechblogging.com/ete/ete.php

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