Malicious PDF — malware analysis report

Static analysis result for SHA-256 793dc1b755499897…

MALICIOUS

PDF

40.6 KB Created: 2021-05-18 02:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-14
MD5: c585522e5b3881be6b5398159dc291a0 SHA-1: 4458e19efe822db084d0daf1a4c1ab0795a86e15 SHA-256: 793dc1b75549989700fef1ed2cddd588bd06f7a5fd7e9e83180a0f1af8ab49b1
190 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0289

Heuristics 6

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/free-robux-apk-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_off000033c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C1 26580 bytes
SHA-256: b9b1435d37db0ee75307ddd879219e873641eb107010e6a086168454de0d9710
font_01_sfnt_off00007189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7189 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off00007d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2A 18360 bytes
SHA-256: e9359734bc9145e2b26d31ba7f580aebc3bf98c57002eb6e857d81b76a5cddb9

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