Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f049670826dddb…

MALICIOUS

PDF

36.1 KB Created: 2021-09-21 08:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1aaeb914d1630778a3700bbc0d645550 SHA-1: 37f3e46fd82d76f455106e53bec5138b1961712f SHA-256: b5f049670826dddbafd14295fc2485ee0071122a00fefaa36d33b3c908c941b4
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. It contains multiple embedded URLs, with three of them being unknown and potentially malicious. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7255

Heuristics 4

  • 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 36 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://sloplast.com/userfiles/files/supule.pdf In PDF document text
    • http://asupuro.com/user_data/image/file/kenewuvotig.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/48881418822.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=punch+hero+android+1PDF link annotation

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