Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ff2ba36833ef3f…

MALICIOUS

PDF

45.8 KB Created: 2021-06-10 22:55:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f6c765951a02e03ea259892ac97f2646 SHA-1: 1086a4ace8ae0b3251d88f9f98652086d7d0501f SHA-256: e3ff2ba36833ef3f4da99cab4aa67993efd5754c8bf6c2bd476f2e2bdcdb901c
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 0.9864

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.tw/app/431946152/free-robux-hack-no-waiting-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-stylish-animation-pack-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-hack-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-gba-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-18_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-g_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/pajamas-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-cheat-in-fashion-frenzy-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/master-coin-hack-apk_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_off00004feb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FEB 26660 bytes
SHA-256: 269cf7685fa22dd8f6c64d1f70fa8fe95db132bf762a857133a853ac65d5966c
font_01_sfnt_off00008dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DCD 19120 bytes
SHA-256: 68b21626d392ed5e15180268ea6ac84168ff7d0702e1d886435613aa3576406e

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