Malicious PDF — malware analysis report

Static analysis result for SHA-256 af83ac7a71630054…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 00:31:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 255fc72540c51e63ffba99e21e0a4481 SHA-1: 2d2791623903f8612477db0c25aa3b42ef6f0f32 SHA-256: af83ac7a7163005458e42fadf68ee3eb1f656a9e0a466581dfb4babf3236921c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it, likely to initiate a download. The embedded URL points to a resource that appears to be related to game hacks, further supporting a malicious intent. No scripts were extracted, but the PDF structure and heuristics indicate a lure for downloading potentially malicious 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/free-robux-obby-game-hack
    • http://hardbit.cn/images/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://hardbit.cn/images/coin-master-pc-hack-download_GM406889139.pdf
    • http://hardbit.cn/images/free-robux-no-verification-needed_GM431946152.pdf
    • http://hardbit.cn/images/roblox-generator-no-human-verification_GM431946152.pdf
    • http://hardbit.cn/images/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://hardbit.cn/images/free-robux-script_GM431946152.pdf
    • http://hardbit.cn/images/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdf
    • http://hardbit.cn/images/coin-master-event-hack_GM406889139.pdf
    • http://hardbit.cn/images/100-free-spins-coin-master_GM406889139.pdf
    • http://hardbit.cn/images/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://hardbit.cn/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://hardbit.cn/images/coin-master-hack-2021-without-verification_GM406889139.pdf
    • http://hardbit.cn/images/roblox-generator-com_GM431946152.pdf
    • http://hardbit.cn/images/free-mojang-account-with-minecraft_GM479516143.pdf
    • http://hardbit.cn/images/roblox-hack-generator_GM431946152.pdf
    • http://hardbit.cn/images/free-robux-codes-2021-real_GM431946152.pdf
    • http://hardbit.cn/images/rbx-roblox-robux_GM431946152.pdf
    • http://hardbit.cn/images/free-robux-no-verification-2021_GM431946152.pdf
    • http://hardbit.cn/images/good-free-minecraft-server-hosting_GM479516143.pdf
    • http://hardbit.cn/images/coin-master-hack-app-ios-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004629.bin
5e84b2f487d3293b5ba22672070bc5f34c08d9f52d0326e5a758ac5c2c2a299e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4629 25936 bytes
font_01_sfnt_off00008159.bin
adb317c4997580e24d4ed6f1d3168dfe6823b431b7b24dbbc6245ab95f909cf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8159 18196 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.