Malicious PDF — malware analysis report

Static analysis result for SHA-256 635bb7a45cd4aed1…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 19:21:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5686974ce4ab180d6075d5e6309b780e SHA-1: c24aebab61c34034be017f95d50ebb9efaa2da4a SHA-256: 635bb7a45cd4aed1ebb080689dc4bc433b187a7d682a23172c5104c4b51bf5c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector leading to a 'game hack' lure. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting potentially harmful websites. No scripts were extracted from this sample, limiting the analysis of further execution chains.

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/coin-master-free-daily-spins-link-game-hack In PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-script-game-guardian_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/roblox-catalog-heaven-cheats_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-no-very_GM431946152.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.baruna-husada.ac.id/repository/free-robux-hack-inspect-2021_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_off00002e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E76 22272 bytes
SHA-256: 0f7b12bd8874fcfcf30a843be5135d8770cb5547d9ad9cda2a88a571235ba57f
font_01_sfnt_off00006008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6008 18768 bytes
SHA-256: 0ceb7b0488aaa16a0c23cac8de9df794ae3fa7cd27271b33a51c469a71425e8d

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