Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ab1626af62caa7…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 07:02:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a69303413ceb6c9346442bce60c33169 SHA-1: f463895cba48fc49fa6fb3c87c0d71b682b289f0 SHA-256: 09ab1626af62caa7c5f394a65c8cf2c10327f2aa93ae6dcf73510cac13ead8bc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' lures. The primary malicious URL identified is https://netcdn.online/app/406889139/google-coin-master-free-spins-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially harmful sites.

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/google-coin-master-free-spins-game-hack In PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://libnh.stikesnh.ac.id/repository/minecraft-images-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
stream_004_off00004f54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F54 25316 bytes
SHA-256: 01c5a050dffbf8d61c71db9b834265489b327a68d6fe0ddbe5a914cb31618e8c
font_01_sfnt_off000088a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A9 18248 bytes
SHA-256: d32188c22f9df4e49535359cc17236f14c93b7b5c7ebedc8928f30f104243849

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