Malicious PDF — malware analysis report

Static analysis result for SHA-256 f700ae0723968421…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 16:02:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5d7ecfa4a5701bd2c30e9e0f232d9b9a SHA-1: e8e567a401a287c31aed3e31b68971e9df25992a SHA-256: f700ae0723968421f189a7cae421384269ad7d431741621afd83213ee6969d56
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure appears to be related to 'free Robux' or game hacks, directing users to the URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-for-free-game-hack. This suggests a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-for-free-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/client-minecraft_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-real-2021_GM431946152.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
font_00_sfnt_off00004995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4995 24868 bytes
SHA-256: f9cd69fa98d3749eeaefef112c0bcb685b581e3a749d1387ecb5ab30edfa7768
font_01_sfnt_off000082d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D0 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off00008c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C92 18280 bytes
SHA-256: 2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3

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