Malicious PDF — malware analysis report

Static analysis result for SHA-256 511cf2bfc1dea9b7…

MALICIOUS

PDF

35.6 KB Created: 2021-06-20 02:35:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d209302c616f9108bf252496bb605bc6 SHA-1: 234d81903ece15e5882b2f9b6a29033d220064ad SHA-256: 511cf2bfc1dea9b7dc45672a3af0b65d45fefbc2b5b25ad6f5ff73c88851d692
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.co/app/431946152/roblox-robux-hack-2021-working-game-hack PDF link annotation
    • http://hardbit.cn/images/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-cheat-in-fashion-frenzy-roblox_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/roblox-66-hack_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://hardbit.cn/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://hardbit.cn/images/minecraft-survival-hacks_GM479516143.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_off00002fdb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FDB 23512 bytes
SHA-256: d874e79bec171363f92910be8cdeb6a2972b1590e69ee395a70c888da67a3ace
font_01_sfnt_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 19516 bytes
SHA-256: 3b66be5508dfdece84a1397b2f7a1a8b49801ef884d9ceadac9d4fd067742b2f

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