Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d8481651e70cf6…

MALICIOUS

PDF

40.6 KB Created: 2021-04-22 15:56:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 3d022de97d1a618690d3f88712fefebd SHA-1: 65d6b61753f017376746cd380e3a5793dc04b60e SHA-256: c5d8481651e70cf6f1caee9ffb81cea340a2679686027782d104173a08f4b3eb
112 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0228

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://netsecure.pro/app/431946152/how-to-hack-peoples-passwords-on-roblox-game-hack PDF link annotation
    • http://www.sepl.net.au/uploaded_files/userfiles/files/roblox-hack-no-download-no-survey-no-password-2021.pdfIn 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_off000034db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34DB 26664 bytes
SHA-256: 1c1a476cb2747e4bd4bf72750dc0d5957ca28897b06b6e0ce7215243eac53fce
font_01_sfnt_off00007193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7193 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007b44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 18852 bytes
SHA-256: d003473aa48930e908f8eb93aaba6c2f706d1d5e65f934b8285ad4b9a2717d66

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