Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cec0e098a72a5a…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 16:37:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 12a31a3a323199b2f2b06a98fdc18d00 SHA-1: d4b53052e063fc47046111e51df34c7435462076 SHA-256: 27cec0e098a72a5ab013c6fd11749c139ffbed4ab5278201948eb6cde0ac3dfc
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. The presence of multiple external URLs, including one pointing to a 'free robux hack', suggests the document is designed to lead the user to a site that likely hosts a second-stage payload or exploits. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect the user to potentially harmful content.

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/431946152/ways-to-get-free-robux-2021-game-hack
    • http://altc.de/images/minecraft-hacks-list_GM479516143.pdf
    • http://altc.de/images/free-robux-hack_GM431946152.pdf
    • http://altc.de/images/free-premium-roblox_GM431946152.pdf
    • http://altc.de/images/coin-master-gold-cards-hack-2021_GM406889139.pdf
    • http://altc.de/images/minecraft-thumbnail-maker-free_GM479516143.pdf
    • http://altc.de/images/how-to-download-wurst_GM479516143.pdf
    • http://altc.de/images/rbxoffer-com-free-robux_GM431946152.pdf
    • http://altc.de/images/how-to-get-free-stuff-on-roblox_GM431946152.pdf
    • http://altc.de/images/coin-master-hack-org_GM406889139.pdf
    • http://altc.de/images/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://altc.de/images/coin-master-cheat-to-get-free-spins_GM406889139.pdf
    • http://altc.de/images/roblox-robux-hack_GM431946152.pdf
    • http://altc.de/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://altc.de/images/blox-world-free-robux_GM431946152.pdf
    • http://altc.de/images/giftrobux-com-generator_GM431946152.pdf
    • http://altc.de/images/roblox-apk-hack_GM431946152.pdf
    • http://altc.de/images/coin-master-mod-apk-hack_GM406889139.pdf
    • http://altc.de/images/games-that-give-you-free-robux_GM431946152.pdf
    • http://altc.de/images/get-me-robux-for-free_GM431946152.pdf
    • http://altc.de/images/coin-master-free-spins-for-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004767.bin
e55b689885a25b2ae513effcf816caf7aff52642f3a29266a4ba3cdc6e450d1e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4767 24824 bytes
font_01_sfnt_off00008070.bin
23f4c6d0bfdce0b55b29b4c4e1f8fc5f357783b93db13de52c4fadcc57c1eadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8070 19128 bytes

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