Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fd9f5fa091cfa9…

MALICIOUS

PDF

31.8 KB Created: 2021-07-19 07:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5adf6ac2bb97c029ec791ed8ed5e47d6 SHA-1: 24f298bf280106d8057f8f89417323af7ae9c399 SHA-256: 97fd9f5fa091cfa94a27be35bba70190685c804bd6da8e21c36fc510066dbe91
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Generator' and includes a link to malicious redirector infrastructure. The document body text and heuristics indicate a social engineering attempt to trick users into visiting a potentially harmful URL. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.tw/app/431946152/free-robux-generator-no-verification-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000243d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x243D 22996 bytes
SHA-256: 129a1dc7199cf9de81a3d0fa9cc93d3646b0d8d423cb6bb57607c0ce4c244017
font_01_sfnt_off000057e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E1 19188 bytes
SHA-256: c8334d64ceff0d271e1d4b51f19afa7d9c31307ce26db46c9e758d58655f0d17

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