Malicious PDF — malware analysis report

Static analysis result for SHA-256 49c0099cdcaae8e9…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 14:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0df79da4ba2c692352b6a809b70ee150 SHA-1: e07c8fe3cc93f8f4b2e780a2004254dc2c44b4e1 SHA-256: 49c0099cdcaae8e9362076321d775ff18abaa517f66a3d754d84352482dec4f4
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with the document. It also embeds multiple URLs, including one pointing to 'coin-master-heaven-links-game-hack', suggesting a scam or phishing attempt related to game cheats or in-game currency. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-heaven-links-game-hack
    • http://colsaf.co/images/getrobux-info_GM431946152.pdf
    • http://colsaf.co/images/minecraft-book-collection_GM479516143.pdf
    • http://colsaf.co/images/ways-to-get-robux_GM431946152.pdf
    • http://colsaf.co/images/rbx-website_GM431946152.pdf
    • http://colsaf.co/images/win-free-robux_GM431946152.pdf
    • http://colsaf.co/images/free-spins-on-coin-master-generator_GM406889139.pdf
    • http://colsaf.co/images/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://colsaf.co/images/robux-robux_GM431946152.pdf
    • http://colsaf.co/images/hacking-apps-for-roblox_GM431946152.pdf
    • http://colsaf.co/images/robloxbux-us-generator_GM431946152.pdf
    • http://colsaf.co/images/roblox-cheat_GM431946152.pdf
    • http://colsaf.co/images/free-robux-with-no-human-verification_GM431946152.pdf
    • http://colsaf.co/images/coin-master-hacksco_GM406889139.pdf
    • http://colsaf.co/images/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://colsaf.co/images/coin-master-free-gold-cards-link_GM406889139.pdf
    • http://colsaf.co/images/coin-master-generator-free_GM406889139.pdf
    • http://colsaf.co/images/roblox-script-executor-free_GM431946152.pdf
    • http://colsaf.co/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://colsaf.co/images/free-roblox-accessories_GM431946152.pdf
    • http://colsaf.co/images/roblox-redeem-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004818.bin
3992ad383b02d06cb6d7f6349a451b318c46bb1019b68fcbd4c4d96067479ad8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4818 25604 bytes
font_01_sfnt_off00008277.bin
86bc3ccbb1f0b7eb9d1186ac4a23e04190280488fc5550aa3b02c029ce2559b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8277 17828 bytes

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