Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de5a96ae388593d…

MALICIOUS

PDF

31.9 KB Created: 2021-06-04 03:09:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 129f2735e234aeb852b627de60525402 SHA-1: 7a6fe4aa95a0bd678db60e1fe812acd71270df23 SHA-256: 8de5a96ae388593d4d37276bba905d1257569c5cf5100b3d442da76ed2571d45
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 https://netcdn.online/app/431946152/roblox-rape-hack-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/spin-free-coin-master_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
font_00_sfnt_off00002bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC9 22008 bytes
SHA-256: 4bd0b0d91eb7a62264966ac9606aacea4128c2d5937727061b5253c994942964
font_01_sfnt_off00005bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BFD 17576 bytes
SHA-256: 1055ca1cad2d7bbeaff866cbfb8363a226b2d26ebf5e2b50d487a21e6a6aa85e

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