Malicious PDF — malware analysis report

Static analysis result for SHA-256 223e6f73bc7aeb46…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 09:17:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 98230ad5747c8b2b41ad9081b585356a SHA-1: 7938b23bc21a09a33014c3a23673e646115e9033 SHA-256: 223e6f73bc7aeb46826cd514ccd9f38af223a18c067c18445931a9c62e396bad
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack' page. The document body, though partially corrupted, contains text related to hacking and includes the same malicious URL found in the heuristics. This suggests the document is designed to lure users to a malicious website, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/como-ser-hacker-en-roblox-con-usb-game-hack In PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-scripter-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-cheat-engine-fix_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/worst-client_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_off00004eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EEE 28184 bytes
SHA-256: 297daf757a6526083b21cfc73eacbfc2261bf670b845e9a1c947fa2ab659d186
font_01_sfnt_off00008e58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E58 18628 bytes
SHA-256: 1ed2799151b9055e320bf23b2e034ad533c3d4a21c8e5c470eae2f59fefe7384

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