Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d3cf9a3f15e9e5…

MALICIOUS

PDF

50.4 KB Created: 2021-06-03 06:09:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4d3d6cb282d68d22098a01d52ad3ef14 SHA-1: ae9aaa6e79263666ad8cb880f2e3cbef1b443323 SHA-256: 94d3cf9a3f15e9e5baf0c5c14c14d4908ddefd3315591de840dedad814199f6f
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 0.9769

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/apps-that-give-you-free-robux-game-hack PDF link annotation
    • http://lib.mappifhui.org/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B9 29096 bytes
SHA-256: 48420efe0a7e4a399725172504cb15cdde5723450a6e4b8eb0807c3e98758b49
font_01_sfnt_off000092cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CF 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE0 19084 bytes
SHA-256: 837a639daa187fc447bd118567dc66774ab6c99c19a83daf34219dbfdd013636

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