Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8e529751f5c77e…

MALICIOUS

PDF

41.2 KB Created: 2021-05-13 22:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 53635de42db823f9d73faf3f449a16ac SHA-1: b08b84872e05b1fcec0d8313f30f0b5c91ce13f9 SHA-256: aa8e529751f5c77ead5266eca9e2d3c7c6a86f4404d775e02bb517101d88eb6b
130 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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 https://netcdn.xyz/app/431946152/how-to-hack-roblox-to-get-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033b5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B5 26692 bytes
SHA-256: 9d43c50a9cfb93dde1419e1bbcc3e1eaa1d7d35c63f9297ed0afa3394e716d1d
font_01_sfnt_off0000709c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x709C 4040 bytes
SHA-256: b52c45903063c68ddac4d6aef6aa6bfd21fcb36297c4c3a7174f4a9ff53286f0
font_02_sfnt_off00007df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DF3 18756 bytes
SHA-256: a768fd9037f2962d7d468f6b0310abba3890de72b41426d235b5de2790bab1ac

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