Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b81f9f805e2c2d…

MALICIOUS

PDF

35.8 KB Created: 2021-09-14 09:56:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0df4e8ae06c985bc40ad0082de8f3a95 SHA-1: 5bb756787e5d6fd7c33e07a38ce0ad5ad27005f9 SHA-256: 07b81f9f805e2c2decae87d1bac2694fb400e6f89ed2c0de7194bd4369fddc82
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing attacks, designed to trick users into clicking embedded links. ClamAV and ML classifiers confirm its malicious nature. The embedded URLs, while one is marked benign, suggest a phishing or malware distribution vector. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8228

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 35 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 http://chongros.com/userData/board/file/fimez.pdf In PDF document text
    • https://erdenetpost.mn/userfiles/files/rezozipisujulatorip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=download+gmail+hacker+apk+androidPDF link annotation

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