Malicious PDF — malware analysis report

Static analysis result for SHA-256 12939a2969a3a3a7…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 12:58:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e6a018f20dc690118ec705f833c7194 SHA-1: d25da46d1db784a57e93c342924bc11e7579519c SHA-256: 12939a2969a3a3a761f0ccfe040e3f38fc85ba03f7797f2521e47b062bc9c353
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 0.9865

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/free-spin-hack-coin-master-2021-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/pokemon-go-free-coins-2021_GM1094591345.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/tiktok-free-trial-likes_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-spin-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-unlimited-spin-hack_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_off00004f5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5A 24812 bytes
SHA-256: c0308d5ca7e2d5717c0e00feb71018d0076395ad73625ce6ca0cb433c8837d04
font_01_sfnt_off00008833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8833 18456 bytes
SHA-256: f06c00d52fdbfeb3859167a0a2229be9ce2cdc54db22dbc1e88046af3d45da49

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