Malicious PDF — malware analysis report

Static analysis result for SHA-256 beffca2581b1f569…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 21:29:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4f3422010026da04614d9327882d2663 SHA-1: 939081ac0dda6ceef53b583e92fa2bfc3119c000 SHA-256: beffca2581b1f569ed85814ad1f1e4a320a2cffb99dfbc7db2f20b4a47f258fc
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 currency for popular games like Coin Master and Roblox. The heuristic firings confirm the presence of external URIs and a specific lure for game hacks. While no scripts were extracted, the document's structure and content strongly suggest it is designed to redirect users to malicious websites, likely for phishing or malware distribution.

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-free-spins-app-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/youtube-how-to-hack-free-robux-using-pastebin_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/ghost-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/descargar-roblox-hackeado-android_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-hack-teleport_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-points-for-robux-easy-to-get_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/cheat-roblox-lumber-tycoon-2-engine_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-templates-blank_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-ninja-legends-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-in-roblox-prison-life-no-virus_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-to-be-lonely-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/code-robux-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-anyones-account-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/classic-builders-club-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-catalog-free-oo_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-account-in-roblox-real_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_off0000312e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x312E 22732 bytes
SHA-256: 5916c66cf46f4c2c40e201aaa3684772b901d846ed95570cf1e633438d83ef7c
font_01_sfnt_off000063ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EA 18176 bytes
SHA-256: 4f2c7f50c50d911764fc5880fa9a71240a98bde4d6a03cad0f4e23413d6df79f

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