Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b344f2472d5814…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 21:37:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb8ca1bd383ba6ae8473633ad160d3f8 SHA-1: a9e6c4da5f31b5fdba71013cefc886aceaad6f1f SHA-256: 41b344f2472d5814248a5871c66aecfdedca7ab517370e842de19fb62c7bc0ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game-related terms like 'Roblox Piano Hack Script'. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-piano-hack-script-pastebin-game-hack. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence indicate a strong likelihood of a malicious download or exploit attempt.

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.co/app/431946152/roblox-piano-hack-script-pastebin-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-online_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-generator-2021-roblox-hack-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-pants-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-by-taking-a-test_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-lvl-7-script-executor-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-games-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-for-robux-with-edit-this-cookie_GM431946152.pdfIn 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_off00002f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F11 22440 bytes
SHA-256: fc21834970fbf56b55f7b5df25ea905e1729f1bae672151f0b3829ff069c70f9
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 19212 bytes
SHA-256: d9e0e8dce6d3e7cc7b5aa49244980491fe4bbce4ee88ea7868cf51a0896fc30d

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