Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d08a5e772bb8b5…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 19:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4f4131cf0c0f93db4c97652dcdefe1cf SHA-1: 524804f6c1fbf241cf41e4102dcb61dcafd0b9e9 SHA-256: 66d08a5e772bb8b568c5ca02e83303d27edf0646500148d9eb2fd2e0b2bb1bc3
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/431946152/free-robux-clothes-game-hack PDF link annotation
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-bubble-gum-simulator-free-pets_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-studio-free-download-android_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/www-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/all-roblox-catalog-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/hack-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-roblox-account-giveaway-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-coins-free_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
font_00_sfnt_off00003292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3292 22668 bytes
SHA-256: cc43e3a4d9ac902e693b7c44e9944767cf7f1ae2834cf8a4502dd568c5bd385e
font_01_sfnt_off0000658b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 19060 bytes
SHA-256: 97364360b0ef57788754a1eb8a616304bf845de832d3f27808b1c0193cfeafc1

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