Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f075f96cc655eb…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 06:16:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 83a3f1da4de4f120c1c2ae39a3b480bb SHA-1: c31a076553341fdbe168bafa7a628230ad3af3c0 SHA-256: f6f075f96cc655ebf7df00a553fbdca51aad3dfea7e8b798a60c1c24a03b15b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary URL, http://netcdn.tw/app/406889139/free-coins-coin-master-iphone-game-hack, is directly linked to a game hack lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/free-coins-coin-master-iphone-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-booga-booga-hacks-no-script-or-ingecter-needed_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/demogorgon-roblox-free-body_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-make-a-roblox-scam-website-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-catalog-stuff-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-bleach-soul-of-end-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-working-genearator-w2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fnaf-roblox-songs-cheats_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-rpbux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/village-coin_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-jailbreak-how-to-get-money-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-roblox-shark-bite_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-minecraft-servers-to-join_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_off00002f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F79 22472 bytes
SHA-256: 58d34ccd5776a44121c749091ba5c333805b9850f5070ce08b82bf237bf64a61
font_01_sfnt_off00006193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 18340 bytes
SHA-256: 30781d46c9e61b7b1a0f84e620c871c295e19140ef15a20a5b93ccdb3b5c2c15

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