Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a68f00a23421c57…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 18:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05cec9d7c4eb59de7ab4aa836c0de22e SHA-1: f19aca415bafa4715cd324ca2af34c40ea1af36c SHA-256: 9a68f00a23421c57ea7c383ebd4c737a453447837c1aac84ddb77cbd3e0c1f4f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacks and free currency, directing users to external URLs. The primary URL, http://netcdn.tw/app/406889139/coin-master-code-hack-game-hack, is flagged as a high-risk redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further payload delivery or credential harvesting.

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-code-hack-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-de_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/25k-robux-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/addrbx-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-youtube_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-avatar-free-draw_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/for-creeper-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-someones-roblox-account-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-someone-on-roblox-2021-new-method_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-roblox-accounts-on-mac_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-cheats-card_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-sparkle-wings-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-mod-windows-7_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-decal-id-free-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
stream_002_off00002f12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F12 22600 bytes
SHA-256: 850e488a3bc3d51ac552ae4db4e2154e3302fb5a970484669ee4d988d31d416f
font_01_sfnt_off00006195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6195 18180 bytes
SHA-256: 6f4994608566ebd9397f6cc175ec3337bd2a095019109335e6b17d055b146122

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