Malicious PDF — malware analysis report

Static analysis result for SHA-256 86b279e888a8eabd…

MALICIOUS

PDF

81.1 KB Created: 2021-03-25 10:54:28 +03:00 Authoring application: Nancy Knight (via Jason Davis) First seen: 2021-04-10
MD5: fb1e830584d6b09955f357290a407295 SHA-1: 1fb87fc98a6b856e7012bd108ceb34faa0dcae3b SHA-256: 86b279e888a8eabdae2d10deb81701fe276bdc2baca0cf34dfcb11f399250b54
84 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3654

Heuristics 5

  • Image-only PDF carries local builder path plus remote links high PDF_IMAGE_LURE_LOCAL_FILE_AND_REMOTE_URI
    PDF is an image-only click lure that contains both remote HTTP(S) destinations and a file:/// URI exposing a local Windows/Linux builder path. That co-occurrence is not normal document linking; it matches generated clickbait/phishing carriers where the visible page is a screenshot and the clickable area sends the user to external 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 81 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Image-only PDF lure with a single link to a non-reputable host medium PDF_IMAGE_LURE_NONREPUTABLE_LINK
    PDF is image-heavy with little real text and its only clickable action is a single external link to a host that is not known-good. This is the canonical malspam carrier shape — a screenshot-like 'click to view' page whose sole purpose is to funnel the victim to one redirect/landing URL on a compromised or throwaway domain. Flagged suspicious rather than malicious because the link alone (no shortener / typosquat / brand path) is the only corroborator beyond the image lure.
  • 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://zk8w01f.zkg PDF link annotation
    • http://ppceg97.sed.aldilamineral.comIn PDF document text