Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a91f60823f8a150…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 01:38:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2552949c70378db92c76c061d8d0c3af SHA-1: aed0daf99c4cfc8e18ba190d854bb8bd28f427e0 SHA-256: 6a91f60823f8a15077c9d4b820e812a5910dde228cea8a7ceb7f3f10105d7ae4
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 0.9980

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/coin-master-free-spins-link-today-twitter-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-hack-get-unlimited-gems-and-gold-irobux-fun_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hax-teamcf-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-for-free-no-scam_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-skin-roblox-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-for-roblox-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/pastebin-free-robux-by-agarminer_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-assassin-hack-coins_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-mm2-free-knife-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/earnrobux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-jackpot-madness-hack_GM406889139.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_002_off00003279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3279 22500 bytes
SHA-256: 8c9ee8ed11a4880fa9d67075a0e534ad1a7c0f4e841dd7ec448505e3a045f9fc
font_01_sfnt_off000064df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DF 18864 bytes
SHA-256: 2193e06c5c3e15f484914b1efa266409fa8c1e9afcaa84d0338c1082155419f6

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