Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6436a5dcdcb64f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 18:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: fa9022b051f492665252de506cac563d SHA-1: 8f61bfc8e1749149871cb221246adca2be893466 SHA-256: 1b6436a5dcdcb64f59e0aad4865e2c477a041858b180c327e72c846ad3341928
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to entice users. It contains multiple embedded URLs, including a primary malicious redirector at http://netcdn.co/app/431946152/roblox-hack-robux-and-tix-mega-hack-game-hack, which likely leads to further malicious content or downloads. The ML classifier and specific PDF heuristics strongly indicate 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.co/app/431946152/roblox-hack-robux-and-tix-mega-hack-game-hack In PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/17-free-knife-codes-on-roblox-murder-mystery_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/hacks-for-roblox-for-acer-one-722_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/roblox-account-crcker-free-v3million_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/free-admin-roblox_GM431946152.pdfIn PDF document text
    • http://balitgetas.co.id/pustaka/repository/moonactive-coin-master-free-spins_GM406889139.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_off00002fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FAB 22468 bytes
SHA-256: 369c9ef129adcc0e5c2eda9860a5f3e32c2183fba7103f4db9db2bf13cf44715
font_01_sfnt_off00006184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6184 19288 bytes
SHA-256: ebcb7a7e2a65de26ff41f5b577c77599578a528a9be0b392a71f5b6fd0894601

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