Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8e7f615e99e396…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 06:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3ffd81c2b03732f5eaea6100dc72bb30 SHA-1: cf7bf0da7ff9a7b90d0da78d6ad9f8fb491e73db SHA-256: 8a8e7f615e99e39650bff6cc9ead8ebf80fd8824a50f8f9e62472c64c33f6247
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 0.9874

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.online/app/406889139/moonactive-free-spins-coin-master-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-fire-vs-pubg-tik-tok_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-coin-master-2021_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_004_off00004dad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DAD 24616 bytes
SHA-256: 9648ea3a47de0b432d7e5fe3283cd5f9a092455d519c0a3e38770a7a9de467b1
font_01_sfnt_off000085d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D2 18000 bytes
SHA-256: 525e065cc595701650099d1f547d5a2db26dd24a903bd4cc3081529fc79bef99

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