Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b46929866207b97…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 02:57:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ace8cb3b619497beaa9cd96ae94a984d SHA-1: 33ec5fdaa7e3a2042234ff20a852db579390cd7b SHA-256: 2b46929866207b9775bc95a3b12ae556fe37cb3060d66022feedddde1c665a6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to trick users into clicking a link. The primary embedded URL, http://netcdn.tw/app/406889139/link-for-free-spins-on-coin-master-game-hack, is identified as a malicious redirector. While no scripts were extracted, the document's structure and embedded URLs strongly suggest it's designed to lead users to potentially malicious websites for further exploitation.

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/406889139/link-for-free-spins-on-coin-master-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/cheat-engine-63-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/buy-robux-free-en-espaol_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-free-no-survey_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-make-a-free-t-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-dount-shop_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/get-free-robux-without-sighning-in_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_off000031a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A0 22700 bytes
SHA-256: 6fb159e0ce38f84fa289837ea10f81504cdc30c0082831fc9297f6b2262430ef
font_01_sfnt_off00006459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6459 18344 bytes
SHA-256: f56b0ea85f0f4ceaa4b3226630b5e27c33b435ed9466ab3582cda34df5208c0a

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