Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6fe03a308ff97e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 18:00:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 1a2de534fa09b467f4d941d9df26dc49 SHA-1: 152cce8cc1d1af3bd8bf928923a4ed6f4913d258 SHA-256: 9f6fe03a308ff97e645666ef8b31ef20be35b72c4e650d77739e7b8090f40d82
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack redirector. The document body and extracted URLs reinforce this, pointing to sites offering 'free spins' or 'hacks' for games like Coin Master and Roblox. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-facebook-free-spins-game-hack, which likely serves as a lure to a malicious payload or phishing page.

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/406889139/coin-master-facebook-free-spins-game-hack PDF link annotation
    • http://katalog.stikesmukla.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/kazoks-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/youtube-nicsterv-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-emotes_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/games-for-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-clothes-on-roblox-iphone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-hacker-mask_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_off000030b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B5 22672 bytes
SHA-256: 7c60d813ee3ddde4e460d8e8a978cd7f03c973c44b62748095c1c1225bde4e8e
font_01_sfnt_off00006361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 18504 bytes
SHA-256: 46e57e29613dd658c869552faba04ca4652fd731f51f8a20629119a06e53848c

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