Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28967eb97daf3af…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 14:25:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc4c18475c8f671720293e233d1d881f SHA-1: 7d582c1d3453b3bfbbbd51f5fa3efb420fdfb6af SHA-256: d28967eb97daf3af73ff18b54bf3397aa8df65b7363d62751e1cf23a394b908e
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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/haktuts-coin-master-free-spins-game-hack PDF link annotation
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-accessories-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-message-wont-go-away_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-charecters_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/best-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/numero-card-robux-50-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-pets-paradise-hack-script-v3rmillion_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/twitter-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-promo-codes-2021-march_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/hack-blox-hunt-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/this-roblox-shirt-gives-free-domimnus_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/el-mejor-anti-cheat-para-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/fisicuffs-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-accounts-with-bruteforce_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_off0000370b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x370B 23580 bytes
SHA-256: 7f378459866dfdc77621270ecad1419c5108c92d1c624ac673428f4ca94f4350
font_01_sfnt_off00006bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF3 18484 bytes
SHA-256: d9a037a653ed28116979e3af0bb76bb4d7eaba1060cd405c4d4ff8bdf95a3337

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