Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ad65e4e1e74ec9…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 20:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 95d6e971b32c4deb5bf926ec0e2db5db SHA-1: 3b80338e01e79a3a28b8662745ce87da75f71da4 SHA-256: a6ad65e4e1e74ec9083e4384e47073a42b4f5c0e693c6f0578ea836582969a2a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically pointing to a Coin Master hack tool. The document body, though heavily obfuscated, contains references to this lure and the associated URL. The presence of embedded URLs and the nature of the lure strongly suggest a phishing attempt to trick users into downloading potentially malicious software.

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/coin-master-hack-tool-2021-game-hack PDF link annotation
    • http://librarysenior.com/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/hackear-coin-master-sin-root_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/pokemon-go-free-evolve-with-trade_GM1094591345.pdfIn PDF document text
    • http://librarysenior.com//repository/instagram-coin-master-free-spins_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_off00004dba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DBA 24912 bytes
SHA-256: 9224efd7ab0eb17fefc7398b1ca733ace0103b008575621ed524924599a81680
font_01_sfnt_off000085aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AA 18192 bytes
SHA-256: 811befa785f1ceb1181632f77b53e437429424eef4610f298aaee61bf5104641

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