QBot — PDF malware analysis

Static analysis result for SHA-256 f6a8d7b8a80827bd…

MALICIOUS

PDF

182.2 KB Created: 1970-01-01 03:00:00 +03:00 Authoring application: FPDF 1.85
MD5: b81d2ebeb8b0f6ed3e84e78ffe784777 SHA-1: f259653033cb741fa326442c22f58e23f36a047b SHA-256: f6a8d7b8a80827bd4729cda40e959823c4c30e648a58832623fda8dae20a08ab
170 Risk Score

Malware Insights

QBot · confidence 95%

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

The PDF is identified as malicious by ClamAV and an ML classifier, and it employs a common phishing technique using an image lure. The critical heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' indicates the presence of invisible links designed to deliver a payload. The primary IOC is the URL http://agencija-sensa.com/way/Cancellation_383560_Dec23.zip, which is likely the distribution point for the malicious ZIP archive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

Heuristics 4

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • ClamAV: Pdf.Trojan.QBot-9982109-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Trojan.QBot-9982109-0
  • 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 182 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://agencija-sensa.com/way/Cancellation_383560_Dec23.zip
    • http://www.iec.ch

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