Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b6a2a536f464091…

MALICIOUS

PDF

43.7 KB Created: 2021-06-03 23:13:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d760e4f77468b9c1c00cab6e7265c363 SHA-1: 163475a9c552b8f704160d8fd611483facba6c2a SHA-256: 0b6a2a536f464091873b70a38bb8cc7be8a41448dbfc8639f410366d9cb2ff01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links designed to lure users into clicking on them by promising free game currency or hacks. These links redirect to malicious infrastructure, specifically identified as a known redirector. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-coinmaster-spins-game-hack In PDF document text
    • http://lib.icbc-indonesia.org//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/inr-to-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spin-daily-link_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
stream_004_off000050ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AD 24860 bytes
SHA-256: 974ced13ee8068c0776a1c5e885e69038cf17952e0ea4d0986e5903f03a9536a
font_01_sfnt_off000088dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DD 18148 bytes
SHA-256: ba216d9844178078b6875fb667333aee6c8c15dd3bf3ba058f093208140005b7

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