Malicious PDF — malware analysis report

Static analysis result for SHA-256 09b082bc20c38008…

MALICIOUS

PDF

34.2 KB Created: 2021-07-07 18:59:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 12fa9fbdb2e1a5a9cea59ef06abf4135 SHA-1: bbdcedd109271754c8ca65f408de6cac843739a4 SHA-256: 09b082bc20c380089ce295480b95a0c6c2f46ef22f614093e51c585f5471cdf1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector infrastructure, specifically advertising 'Coin Master Hack Unlimited Spins Apk'. The heuristic firings indicate the PDF links to known malicious redirectors and employs a lure for game hacks. The embedded URLs and document body content strongly suggest a phishing or malware distribution attempt, likely leading to a download of a second-stage payload.

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-hack-unlimited-spins-apk-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tarjeta-hack-para-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-speed-hack-in-dungeon-quest-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-animation-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/prison-life-vending-machine-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-with-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/pastebin-roblox-free-catalog-dominus_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/greenville-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-studio-free-app_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-free-commends-on-roblox-innovation_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-anti-hack-saving_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_off0000307c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307C 22136 bytes
SHA-256: 19163a9443aba8b44ec7fad520a36a26d9b7d5bc21600a1140511038431f51be
font_01_sfnt_off00006148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 18876 bytes
SHA-256: 9ae5964c59c7b5357b8ce870d7e4cb44671cda4bfec92866a7ed4d057cfe7744

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