Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa3352e37ed7f25…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 03:52:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 953d94f84ffe5fccdcfa5cf13e783dd7 SHA-1: 65241498733cea563172deb7a35f676551e86813 SHA-256: caa3352e37ed7f2569350762f3e29e4098240d4fb4f55515eb9525320f7de303
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary link pointing to 'http://netcdn.tw/app/479516143/wurst-client-18-9-game-hack'. This URL is associated with a lure for game hacks, indicating a social engineering tactic to trick users into downloading potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/479516143/wurst-client-18-9-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/hack-de-roblox-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-free-robux-points_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/whats-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F73 22260 bytes
SHA-256: a706b4814fa77d930985cf8f4aa2188941534e37d0017f320bea093c51b6b7ad
font_01_sfnt_off0000600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 18748 bytes
SHA-256: a23ecd77200a7fb956c9aee1e1a08a0d53252202f2f85d8cee511cc2d05ab179

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