Malicious PDF — malware analysis report

Static analysis result for SHA-256 421b045e3e86b0cc…

MALICIOUS

PDF

99.8 KB Created: 2026-05-27 14:08:18 +02:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-28
MD5: 438199dee0e68865995a6c2ac031095a SHA-1: f2f04e244c18a4f6677752f56872bf50ae1c2a27 SHA-256: 421b045e3e86b0cc738c1424f61d327dd19c70335ed8fa4b5ad75c776adbd670
122 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0010

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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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 99 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://tinyurl.com/yux9kp8u In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (font_00_sfnt_off00012faf.bin)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_000_off000001cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CC 315074 bytes
SHA-256: 247ce851d008abb71a4d42b4099f25ac8eb1c9d97e79bf6fdcf8425045de2281
font_00_sfnt_off00012faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAF 15676 bytes
SHA-256: d2adfe2ca01cf04608da520dbd71cfe79a7ab0516edf53c0edbe3569d74c05e3
font_01_sfnt_off00014bb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB3 14256 bytes
SHA-256: 61462ae18132282bf4da89c171a5cb86b7d52611d05ca124d6d0d494b0aab197
font_02_sfnt_off00016309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16309 17520 bytes
SHA-256: cff237cffc5da4e885345adc1d99e0f82c9f8689952ce067ee2cc3427524b2e2
font_03_sfnt_off0001861b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1861B 792 bytes
SHA-256: 56b712e630cfed1b9f4013a6458874cf9350000ffc6e12991770e1f4febddd11