Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4959ebc1ad023ea…

MALICIOUS

PDF

193.9 KB Created: 2017-09-29 02:06:48 +01:00 Authoring application: Microsoft® Word 2013 First seen: 2021-05-29
MD5: e20bddc5bfeefea99cca9896871ec19f SHA-1: 5f3a213ef9942cc4a69662e5f5173c163995a86b SHA-256: b4959ebc1ad023ea04f701d2d5af3bc3742566de8e31d7a6d20747889f332e0e
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is an image-only lure designed to trick users into clicking a link, impersonating DocuSign. The embedded link, https://sodecoperu.com/Docusign/index.php, leads to a phishing page. The use of a URL shortener (http://u.to/qchHEA) further suggests malicious intent to obscure the final destination.

Machine Learning

  • Nyx PDF Classifier clean score 0.0636

Heuristics 5

  • 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 PDF lure links to a brand-impersonating path on an unrelated host high PDF_IMAGE_LURE_BRAND_PATH_LINK
    PDF is image-heavy with little real text and its clickable action targets a URL carrying a brand name ('docusign') as a path segment on a host that does not belong to that brand and is not known-good (e.g. 'sodecoperu.com/Docusign/index.php'). This is the credential-phishing carrier shape where a compromised or unrelated host serves a brand-named phishing kit behind a screenshot-like lure page. Distinct from the typosquat-host rule: here the host is honest-looking but the brand lives in the path.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 193 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://sodecoperu.com/Docusign/index.php PDF link annotation
    • http://u.to/qchHEAIn PDF document text

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