Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e4e7d9c9802aa9…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 08:54:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3c9d0ae6d15c7eb7f75a43c6690c3225 SHA-1: b3b67d72548703e1cbcc007914c00bef5039c513 SHA-256: 46e4e7d9c9802aa9de45e961c60194f24debe4d7b51628c24f1739b17420931f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of these links. While no scripts were extracted, the document's structure and embedded links strongly suggest it is designed to trick users into visiting a malicious site, likely to download further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-game-game-hack In PDF document text
    • http://e-library.akademitelkom.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://e-library.akademitelkom.ac.id/repository/free-robux-generator-2021_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
stream_004_off000053f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F8 25280 bytes
SHA-256: c0e348cc018b0f12fd468fa3bc9a57bb1b46eed69c29c56b4f23fe94782c856c
font_01_sfnt_off00008e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E19 17700 bytes
SHA-256: b93d612aafaf320a9faae270f9b704b5d16f035777fe6e7ab5087b19b273c749

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