Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2b9aa302c0d326…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 13:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 322b1584518b2eab62d28f5028ade9da SHA-1: 61b9de2d291d88bcb8391a47df1c2caa00b86879 SHA-256: 4e2b9aa302c0d326d15524e2b57b6b31b86784d7b2b32f987240221b7040f96b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coins-and-spins-for-coin-master-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-free-pants_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-for-kids_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_003_off00004a79.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A79 24636 bytes
SHA-256: 1e52aa89971902c9160b2f1dea2558590580d7893a3a07611b145ba73a17a103
font_01_sfnt_off00008279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8279 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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