Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aae9a451ea621ba…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 14:42:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 757048127ba6f730890c7cfde7dff0ca SHA-1: e159350947d5d210d653d8827d789036601c0695 SHA-256: 6aae9a451ea621baa11f2df32750bcd384c2c7313bb0b3bf6108f7c41c52303e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and currency generators, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a phishing or scam attempt. No scripts were extracted, but the document's structure and embedded links suggest it is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/free-gear-in-roblox-2021-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-when-will-bloxburg-be-free_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F66 25128 bytes
SHA-256: ad70359b1f6338bd146c062199f7d198d20f5a130b7852ca358aa6cc47457c97
font_01_sfnt_off00008975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8975 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9384 18576 bytes
SHA-256: 6ed735b3c1de3401972f8580f3ce6a21b65af0acb1b1b6864d80308a5dd6bd47

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