Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf4f972957ffd04…

MALICIOUS

PDF

34.8 KB Created: 2021-07-09 05:47:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: acaa16eabf1c5c3d6fa566df912a45d2 SHA-1: ef32dade4dce0382d4ea4e9827c883f0dc84c867 SHA-256: bcf4f972957ffd040a48f11c77e10ddc5f76ed29abc996f3baf61ddfc3699fc5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/431946152/roblox-hack-tool-game-hack PDF link annotation
    • http://www.ck-ceramic.com/Public/upload/editorfiles/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/female-hacker-roblox-catalog-clothes_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-roblox-injector-hack_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-bypass-songs-roblox_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/robux-hack_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.ck-ceramic.com/Public/upload/editorfiles/free-mods-for-coin-master_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_off00003229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3229 22576 bytes
SHA-256: e201d47f33b99e3cee0cb43e35d56bab07a7b2068802bf51b2ea289f7892a7b5
font_01_sfnt_off00006426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6426 18656 bytes
SHA-256: e8d3b80f1b6f2c9c2bf73e7970ea5f3b8003eca05e06d1d82551611c8be56651

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