Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50d386d9dea7c74…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 13:40:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 183c7c658fedd47b38968dc183e5f8b6 SHA-1: 6e2956948a4ea42daf76609c6952078c3cb2e92a SHA-256: b50d386d9dea7c74b50dbc413f618c745b840ba23c6bb01f67f72cbea5229029
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free spins. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this deceptive intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to malicious sites, likely for malware distribution or phishing. The primary IOC is the redirect URL found in the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/daily-coin-master-free-spins-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hack-version-of-coin-master_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-18_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-robux-gift-card-generator_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
stream_004_off0000512d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512D 24632 bytes
SHA-256: 5fad7e9dcab2ef95543058efa65d2b24072ebcaedd10e5c33bb406b86964f2d0
font_01_sfnt_off00008904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8904 18308 bytes
SHA-256: 2e377c4e9f27697957871a52337602293a8911c67983c74714bc140e9d069187

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