Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e9ef2cf8beb65d…

MALICIOUS

PDF

37.1 KB Created: 2021-05-22 06:38:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0d523f413c0cab02eebbedd0877da9db SHA-1: 5393a54a0e851498aee895881b289db0ca243704 SHA-256: 92e9ef2cf8beb65d281266ddb116d4446894fbc7b6233e543bbf9e2cf0671a93
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure, directing the user to click on embedded URLs. One of these URLs, 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-verification-game-hack', is presented as a way to get free Robux, a common social engineering tactic. The document body also contains text and links related to game hacks and generators, further supporting the lure. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-robux-without-verification-game-hack
    • https://www.contabilidadesomma.com.br/images/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://www.contabilidadesomma.com.br/images/free-robux-redeem-codes-2021_GM431946152.pdf
    • https://www.contabilidadesomma.com.br/images/coin-master-free-download-pc_GM406889139.pdf
    • https://www.contabilidadesomma.com.br/images/hack-coin-master-apk-download_GM406889139.pdf
    • https://www.contabilidadesomma.com.br/images/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000337b.bin
822e607c0d22454b725ef870ddeb5808cb272dd175ff577f2883f907aa6ec3f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x337B 25408 bytes
font_01_sfnt_off00006d23.bin
fe2fba94a2d86c9c71a87afecb14f9f9cb432365285dbf62d8027955010708b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D23 19128 bytes

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