Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6fef3cda35d0f4…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 11:54:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1ba11ab1443384fbcab65c6ec7d22874 SHA-1: f0fc2c6d300ae8b658c5c5f408d57d06c9a23fa2 SHA-256: 3a6fef3cda35d0f46af6f29350383e902bce3daaedfb6872dbf559ae31e95fab
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/coin-master-free-coins-hack-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/a-roblox-profile-have-russia-profile-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-teleport-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hack-badge_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cheats-for-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hackear-ordenadores_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/rorewards-com-earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cheat-engine-keeps-getting-me-kicked-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/jack-hack-robuxcom_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_002_off0000316d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x316D 22936 bytes
SHA-256: dafb8f265d0cb768d9e031b5ee149b4f606a3a41bc3977185d3c747b788e38e1
font_01_sfnt_off000064e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E3 18168 bytes
SHA-256: f6a958b5ee3bd5b31fa7bb34e70f4f188eadbb3e5a663de667095cc8c499d1ed

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