Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcca2dc9c298fd75…

MALICIOUS

PDF

46.9 KB Created: 2021-05-10 23:33:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 28ad3db056d1fb957c19623368c25b5b SHA-1: f76efbe753f33a2cf261cd437cd3d7c71667039e SHA-256: fcca2dc9c298fd755c62eb103f87c847b8f941d20de290c430eba3cfd7a01d12
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and links to external URLs, including a redirector at `https://netcdn.xyz/app/431946152/free-robux-2021-no-human-verification-game-hack`. This suggests the document is designed to trick users into visiting malicious sites or downloading further malware. No scripts were extracted, but the presence of embedded URIs and the 'game hack' lure strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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 https://netcdn.xyz/app/431946152/free-robux-2021-no-human-verification-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-points_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b07.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B07 27364 bytes
SHA-256: 3c8e5bc915c41b3b02ef83efe5ae2f2b212d282756dd8d7270ed9b79ed9b8c19
font_01_sfnt_off00008846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8846 2820 bytes
SHA-256: d88f25cfe237a714f996150a11dd8a058f0f7c3e9d1ae91c17b46c10409b6c0b
font_02_sfnt_off000091e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E1 19260 bytes
SHA-256: a5b009a33d06eb91b5687aca452054299973906144ac3f9b2fc2dd0e2fef1dac

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