Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9b5b18d92b0331…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 19:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4552766b7ac8f1c96f009d02f11e7327 SHA-1: a9b824e33227524935057a131842be61f75750c5 SHA-256: 9c9b5b18d92b03319c13ea9321bfb2a56c989b47da02f661e317b73217dec9ba
82 Risk Score

Malware Insights

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

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used to deliver a malicious payload.

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.co/app/431946152/wild-and-free-id-roblox-code-game-hack PDF link annotation
    • http://library.imz.or.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/irobuxcom-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/change-roblox-username-free-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/minecraft-app-store-free_GM479516143.pdfIn PDF document text
    • http://library.imz.or.id/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.imz.or.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.imz.or.id/repository/www-rubux_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_off00002f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F39 22004 bytes
SHA-256: 8a7c2fe23434c5dcb40bfe3b24db098eb015709d519c54a7f7f64d2073f91dd6
font_01_sfnt_off00005fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDD 19140 bytes
SHA-256: 08282aa116036b1287f17d01bda4f35fce59253319e8ff1a9a854e942aa9379a

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