Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a54db6000df5057…

MALICIOUS

PDF

32.8 KB Created: 2021-07-05 07:21:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f6d291b44f56ca4e418e364834c4b227 SHA-1: 9443c263ee9040e0d88324705b3ca34641ab63e5 SHA-256: 4a54db6000df505780b879f3dfaf30de3dd37228cc473768c4482b8783564228
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic indicating it links to a 'free generator / game hack' redirector, specifically http://netcdn.tw/app/479516143/minecraft-xbox-360-free-game-hack. The document body reinforces this lure with text related to game hacks and a call to action. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/479516143/minecraft-xbox-360-free-game-hack PDF link annotation
    • http://library.yamasi.ac.id//repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/real-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hacks-for-build-a-boat-for-treasure-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/pubg-uc-easypaisa_GM1330123889.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-vehicle-simulator-roblox-upate-10-12-17_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-hack-roblox-accounts-for-robux_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_off00002ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD0 21932 bytes
SHA-256: 12a612e1eb4dfb143ea91f539d15636ae1488c22b876ea1595c7bf7ec4657039
font_01_sfnt_off00005b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1D 19108 bytes
SHA-256: 780e9e18689037371e4a8046ec7fe45e0606f213fc1aea5451374ef80604f4b5

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