Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a36f5de9869e183…

MALICIOUS

PDF

54.5 KB Created: 2021-05-26 10:35:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 7ffcc50b58ac02aa8f621ff603bdeb8d SHA-1: e1248834cdef5d60b8b938b60d76ec5918ba5b15 SHA-256: 4a36f5de9869e183265c5c6ca5cbb6690d6f2172df7863fc3a3f31104ec2ea59
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, containing a single image and minimal text, typical of phishing attempts. It directs users to a URL shortener, which likely leads to a malicious site. The heuristic 'PDF_IMAGE_LURE_SHORTENER_LINK' specifically flags the use of a URL shortener for this type of lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0425

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 54 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://elonmusksstatement.page.link/yAFe In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC7C 15472 bytes
SHA-256: 3ca91ef1fc41644eeec2ac5f28ed72eee433f8e4275001a2c73dbeaec919ecfd

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