Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b06191814a8f12…

MALICIOUS

PDF

49.3 KB Created: 2021-06-08 17:31:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 304341a08c550be757715e7c1bd6ea26 SHA-1: 898a53fd7bd1dc7332a7733df960aabe5a7d73e9 SHA-256: c4b06191814a8f1250e197e0e558ac978bd05257bfc8bfabc2bc3c855ff9f322
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 0.9796

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.tw/app/431946152/roblox-apocalypse-rising-hack-september-2021-game-hack PDF link annotation
    • http://www.gox.pt/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.gox.pt/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/who-to-hack-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.gox.pt/images/tiktok-free-recharge_GM835599320.pdfIn PDF document text
    • http://www.gox.pt/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://www.gox.pt/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://www.gox.pt/images/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://www.gox.pt/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.gox.pt/images/how-to-get-free-robux-app_GM431946152.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_004_off000050f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F0 26232 bytes
SHA-256: 83a4d5959d2bfc91de817703ea79318a7c1e7606e4dfa9892d05aa098880d0f6
font_01_sfnt_off00008c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C57 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9969 19712 bytes
SHA-256: 476ea109a17102c91e56da615cc543eeb766300cb024c1e092634755169eb980

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