Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4fc04b37271397…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 11:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 922528cad03261be9033ddd6e2378b6b SHA-1: 9376222f1c3d44d01d200a9c28fd559b7cca7a9b SHA-256: da4fc04b3727139731232278374afb416ddfa6b09276eda79cb1da1336bf8516
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-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack PDF link annotation
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-minecraft-account-and-password-2021_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/roblox-gui-hacks_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/robux-redeem-codes-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-in-iphone-5_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/ideos-para-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/sk8er-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://mtsn-baranti.com/perpus/repository/free-robux-no-verification-2021-ios_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
font_00_sfnt_off00003105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3105 22052 bytes
SHA-256: 0e3caf84cd478e42c97d5a4bce068b4010d0aa9c7f1b4f477b64538b1bfed968
font_01_sfnt_off000061ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CE 20124 bytes
SHA-256: e8dc8af608a2467c92ba912a1f660b74916591188ffd601a7d8b89018af53e3a

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