Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9f2b6ec3347014…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 13:02:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 28b416db64a5a67368c97d582504a068 SHA-1: c5858e6c665bcd108bb72f38d24abb41b8345b73 SHA-256: 3f9f2b6ec3347014c923b8d2ee386e10ec35a556723ff8d6c9ce18cce20292b8
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-spin-and-coins-fbid-links-game-hack PDF link annotation
    • http://oca.undil.tl/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-in-asssin-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-devil_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/earn-free-robux-site_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-builders-club-free_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
font_00_sfnt_off000031ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BA 22284 bytes
SHA-256: 4019b82930279169d932379ae96f7f6267bb99bee1ea72536d895a870ce4c8b9
font_01_sfnt_off00006310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6310 18676 bytes
SHA-256: 262c64d5fcde4ae00765da890d7cc479433627fe6c322491389893b762d4f5bf

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