Malicious PDF — malware analysis report

Static analysis result for SHA-256 829964122314e5c7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 06:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5db7bf65fd0322d0829b7f09eda27800 SHA-1: 17ee35d1f32c53be5409a52fb9168f8d316d9e1d SHA-256: 829964122314e5c7eb81589f28cdf785845dffd5cefdeebc6f25f3af8bcc9090
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'free generator / game hack' lures. The ML classifier strongly indicates maliciousness, and the document body, though partially corrupted, contains references to these lures and external URLs. The primary URL http://netcdn.tw/app/479516143/free-minecraft-skins-java-game-hack is a key indicator of a potential phishing or malware distribution site.

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/479516143/free-minecraft-skins-java-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-sell-a-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-cheats-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-how-to-get-free-robux-tips_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheat-engine-63-roblox-tycoon-hacks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheat-engine-67-download-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-youtube-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-links-blogspot_GM406889139.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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 22628 bytes
SHA-256: 1b25fba966f86568ac9f0f196b3067c5ae3859dfb3d8b10500b5b3f681b118f3
font_01_sfnt_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 18304 bytes
SHA-256: 401eb49ff2a7bbc2c0a7320b67dbf183b2d718a040190e5e2c5f0615a3ea9473

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