Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4b3eceab14ecd6d…

MALICIOUS

PDF

35.5 KB Created: 2021-06-20 05:41:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: baaff86a00afd0a7489de372a0736baa SHA-1: a9fd42b5db22b88485dc21d29508d01c9253ab8f SHA-256: b4b3eceab14ecd6dba85b8699c2fef290631dca439df9bff70fdde8d39f5e0ab
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a document body that explicitly advertises game hacks and free in-game currency for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, indicating the document's primary purpose is to redirect users to sites offering such cheats, which often host malware or engage in scams. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/cheat-engine-roblox-lumber-tycoon-2-money-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/free-raindrop-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/robux-mod-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/all-minecraft-handbooks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/the-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-hack-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-weight-lifting-simulator-3-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/como-hackear-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-dto-hack-in-to-robloxs-account_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-outfits-2021_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_off00002fdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDC 23096 bytes
SHA-256: bc0b634a8d48f6e551d89deab697c9dd0132e9d9e5a4ca68ef24a1e9e50cb127
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 19776 bytes
SHA-256: 4bf0570d2015baebe9cdcb4dd7232563b2ea4ee839a6cac0bd24656688cac6e9

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