Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b55b043fdcae948…

MALICIOUS

PDF

33.4 KB Created: 2021-07-05 18:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 14a19ba0968233c3f7d17408ebb4c1f4 SHA-1: 6b6d487fe01e9e710a7c841766b6d2f849dd7a94 SHA-256: 7b55b043fdcae94857798e75397763eec0696fd2c66a65d43818ee5609a80fd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items, indicative of a phishing or scam campaign. The embedded URLs, such as http://netcdn.tw/app/431946152/roblox-arsenal-hack-game-hack, are designed to lead users to potentially harmful content. No scripts were extracted from this sample, but the document's structure and embedded links strongly suggest a social engineering attack.

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/431946152/roblox-arsenal-hack-game-hack In PDF document text
    • http://digilib.iailm.ac.id/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-create-a-website-like-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-hack-2021-apk-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-robux-sin-verificacion_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-play-games-for-free-descarga_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/robux-for-free-pc-computer_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/da-hood-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-glitch-codes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-game-cards-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/no-virus-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/is-minecraft-vr-free_GM479516143.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_off00002f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2C 21556 bytes
SHA-256: da317f997f83bc0d093b983324121d5e7f6530fd5078324c83ef2ae2a3cff346
font_01_sfnt_off00005e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E69 18656 bytes
SHA-256: 2a9da7e207da7f151e9dc698eb3be8a302bb8ec18d8a029c2d8305e65e62f0f4

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