Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f33238c0fabe39d…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 10:53:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1e8809ac7176adb06351d81ccd81dc1c SHA-1: 45d8b61863fcc662542f7848c649918fcfdb9082 SHA-256: 9f33238c0fabe39d03e1feaad958c02d3c108d98d2316434061b056ab7588352
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful websites. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-no-verification-2021-ios-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/roblox-hacks-extensions_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/400-million-robux-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-hack-generator-club_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/hacker-man-bandit-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hack-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-jailbraik-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/wheel-decide-free-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/skin-for-roblox-girl-free_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-hack-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000033cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33CC 21960 bytes
SHA-256: 328f6830023ccf139cc8ea80b0111b9b117dd7bd4feb98b881417ffd52477bc7
font_01_sfnt_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 19476 bytes
SHA-256: 9fe1ea1c86177197d61ed707d4c4071d93c63f21ffdcda5dbf12cc87dcc1e4af

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