Malicious PDF — malware analysis report

Static analysis result for SHA-256 57bef990a00f0aa8…

MALICIOUS

PDF

37.1 KB Created: 2021-07-05 20:44:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e63852fd59b7e52f576ae95253b7afec SHA-1: 80fb13abcff7e2477d48a7fd0c862fec3d930bb5 SHA-256: 57bef990a00f0aa8ca27fb0921a75f8a15473bc03f934f918472c4952b84c0cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a prominent link and text related to 'free spins' and 'game hacks', specifically for Coin Master. This lure is designed to trick users into clicking the embedded URL, which points to a suspicious domain. The ML classifier also flagged this PDF as malicious, supporting the conclusion that it is a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 http://netcdn.tw/app/406889139/how-to-get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://www.fkunismuh.org/perpustakaan/repository/itsmerade-best-roblox-free-level-7-executor_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/pokemon-go-free-coins-hack-2021_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/topkek-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/gamekit-robux-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-robux-for-free-that-actually-works_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-granny-hack-script_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-games-com-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-com-hack-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/united-gaming-net-coin-master-hack_GM406889139.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_002_off000030e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E4 22808 bytes
SHA-256: 9b4f76b764464f89ff06e88c26e1e2987d398ee964fc21bae6c0d8222e036555
font_01_sfnt_off00006422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006e07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 18336 bytes
SHA-256: 11de4304e4fdf887d410d1e4a25cee46ae29c04a9263dbbe12b650d8207992b4

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