Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c72e6ab6c0491cb…

MALICIOUS

PDF

38.4 KB Created: 2021-05-26 10:24:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0bfd97a0c7fe3e41eb78f013ba95df96 SHA-1: c12b3858c6c254e9fee5bdb2231e04dfa33955f9 SHA-256: 3c72e6ab6c0491cb02ae0d269a76de602dbbed730ca8406725e2d29fc5a25bbf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic to trick users into clicking on embedded links. The heuristic 'PDF_IMAGE_LURE_SHORTENER_LINK' specifically highlights a shortened URL, which is often used to obscure malicious destinations. This suggests the file's primary purpose is to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0757

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://newselonm.page.link/vNfD In PDF document text
    • http://www.microsoft.com/typography/ctfontshttp://www.fonts.comMicrosoftIn PDF document text
    • http://www.microsoft.com/typography/fonts/default.aspxIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F04 9772 bytes
SHA-256: c2194650dfa838c294319df5f923146457cee04fa354be3a11e9d914f09e040d

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