Malicious PDF — malware analysis report

Static analysis result for SHA-256 236929ce33392e65…

MALICIOUS

PDF

32.8 KB Created: 2021-07-05 04:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 257c057221c178d40a0936a7ff59c3b3 SHA-1: 7b0f477bda7f4967ebe280b261c284ad680c61b5 SHA-256: 236929ce33392e65239347360b0320728fe8181cd588f1f90644b32dac8dd684
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA lure, encouraging users to click on embedded URLs. The primary URL, http://netcdn.tw/app/479516143/free-minecraft-capes-game-hack, is likely a distribution point for a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/free-minecraft-capes-game-hack PDF link annotation
    • http://elib.acls-indonesia.com/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-swat-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-vip-server-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/bxworld-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/ww-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacks-to-get-robux-in-tower-of-hell_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/only-today-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-dll-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/pokemon-go-free-bot_GM1094591345.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-5-robux-site_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_off00002e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E08 21900 bytes
SHA-256: 5146f1189f86dba4a2a270c705bf4f755cc8a2a414b1ca703f2238bed7bd14bc
font_01_sfnt_off00005e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 18032 bytes
SHA-256: 1e862981e003b551836a585810ec825e70eaac9e05fbd38dc5ef0e36a4934143

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