Malicious PDF — malware analysis report

Static analysis result for SHA-256 f78c0384fedffe2f…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 09:36:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6d5f6ac1a85a3d29e72a3ea21d6c213b SHA-1: 4a6db990630b83d6e4c2a7c477fa9e5388dabcd1 SHA-256: f78c0384fedffe2fddf8a5f32679e6c0c2bda610e8f7599100c59a0e2478eb56
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'game hack' which redirects to a malicious URL. The ML classifier strongly indicated maliciousness, and the embedded URL is highly suspicious. While no scripts were extracted, the document's structure and content suggest it's designed to trick users into downloading a payload or visiting a malicious site.

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-com-hack-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-robux-easy-and-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/best-free-roblox-script-injector_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/unlimited-health-hack-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-100-real-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-oof-sound_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-roblox-codes-2021-may-sunny-hollow_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-pokemon-go-cheats_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-r-logo-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-robux-hack-2021-easy_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/anarchy-roblox-hacks-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-how-to-get-free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-use-hack-on-roblox-with-admin_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-robux-and-tix-download-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-cheat-2021_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_off000030de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 22856 bytes
SHA-256: 108bbc47d35562c09c58cc625ad74cccc8f2c498258b4f3d90b990e0adc2af0b
font_01_sfnt_off0000640e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640E 18916 bytes
SHA-256: 9cb05533f98f4e2367072af5f88feb3ab929c06b5a26e3a671612f35ad90b071

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