Malicious PDF — malware analysis report

Static analysis result for SHA-256 91573e2aad89c56a…

MALICIOUS

PDF

38.5 KB Created: 2021-02-04 02:52:53 UTC Authoring application: Writer (via OpenOffice 4.1.8)
MD5: e9f991cbda73482d20734d9cc7572c78 SHA-1: a0137943995f841b37ead9d62e2d3c15e1027615 SHA-256: 91573e2aad89c56aafd30ee2dd1155ef1e2b38a2d2856a3201e1f600e6685217
60 Risk Score

Malware Insights

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

The sample is a PDF file identified as an image-only lure, a common technique for phishing. It contains a single embedded URL that is shortened via bit.ly. The heuristics indicate this is a high-priority finding, suggesting the link is intended to redirect the user to a malicious site for further exploitation. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0028

Heuristics 3

  • Image-only PDF lure links through URL shortener high PDF_IMAGE_LURE_SHORTENER_LINK
    PDF is image-heavy with little real text and its clickable action points to a URL shortener. This is a high-confidence credential-phishing carrier shape: the visible page is a screenshot-like prompt while the destination is hidden behind redirect infrastructure.
  • 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 38 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 https://bit.ly/3cBxHoA

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