Malicious PDF — malware analysis report

Static analysis result for SHA-256 49028bc45c761cf4…

MALICIOUS

PDF

21.8 KB Created: 2021-05-28 10:32:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: e0e82c7aa7e644d0541c6ad5e33f2137 SHA-1: 0fc144dcadc4eb63fabca7fa6baed130eacacbce SHA-256: 49028bc45c761cf48891b95c1eba8eaadb6029fd1177592f210de725031922f1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that presents as an image-only document, a common lure technique to trick users into clicking on an embedded link. The heuristic 'PDF_IMAGE_LURE_SHORTENER_LINK' specifically identifies the use of a URL shortener, indicating an attempt to obscure the final destination. Although the linked URL was marked as confirmed benign, the overall structure and heuristic firings strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1241

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 21 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://znakudachi.page.link/oQ8s 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_off00003ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AE0 15352 bytes
SHA-256: 568a53de0f2e7dec117e8e7df3e42ddb964b5e92b06f1495abdb595a72072413

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