Malicious PDF — malware analysis report

Static analysis result for SHA-256 fda8876badb721e4…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 04:16:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8a87e5ef69d7af28ba75c3ac510ce0bf SHA-1: 5f27f9a2c594b4a8b666bd666e92da7e7cc060bc SHA-256: fda8876badb721e402902b33e41a33d0d6c9029299165e5afeb50f53742c0615
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/free-links-for-coin-master-2021-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/face-png-roblox-free-face-q-se-queda-para-siempre_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-roblox-beta-one-piece-legendary_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-free-version_GM479516143.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_002_off000032df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32DF 23044 bytes
SHA-256: bc94815e44d9e8e56ac71c8d016479e33ff68b33401b33034c83f8f8d2aa987f
font_01_sfnt_off000066f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F6 18568 bytes
SHA-256: 34c41f6034bb509db0764afb8d1eb6542079e354efa60f14173f389e2c0d1fb4

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