Malicious PDF — malware analysis report

Static analysis result for SHA-256 e246bb375bc2cf30…

MALICIOUS

PDF

35.6 KB Created: 2021-07-09 03:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1c2862c44b9670c20688d575c10896a6 SHA-1: d7d1713a915e646b1e4cedf65df0d9557a4c8c40 SHA-256: e246bb375bc2cf30a4201b09103b1d65bf419b6631645429f7fefadbacd50eba
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of game hacks and free in-game currency. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest the document is designed to redirect users to potentially malicious websites for further exploitation.

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/406889139/25-free-spins-coin-master-game-hack PDF link annotation
    • http://uilis.unsyiah.ac.id/ebook/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-horror-tycoon-hack-script_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-robux-gratis-como-tener-robux-gratis-en-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/coins-master-hack_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-robux-android-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-cheats-i-found_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/kuso-icu-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-tools-download-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-a-free-robux-card_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/fisticuffs-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-adopt-me-free-fly-potion_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/hacks-piano-roblox-en-2021_GM431946152.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://uilis.unsyiah.ac.id/ebook/repository/https-wwwroblox-thewiredhobo-tixrobux-hack_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_off0000341f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x341F 23076 bytes
SHA-256: eb85471f494a05269e07e37c7a3597b99c3fd422f8f7043274e8a55e81062a0d
font_01_sfnt_off00006824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6824 18432 bytes
SHA-256: ec79058dc3660cd38899abd0af6a529c62159de1466b2a8febb865623eb50a1d

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