Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4dda6562122d127…

MALICIOUS

PDF

36.2 KB Created: 2021-05-18 01:01:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4aeaf1e6f773ad9e93176578cd8ec727 SHA-1: e88aa5cd81abc85ad9be406071e256459a0dced9 SHA-256: c4dda6562122d127ab10563dcd076c4f26426e0a811c24bd4bf4f7cb7c520e09
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to a "Coin Master" game hack, directing users to a suspicious URL. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may also attempt to phish for sensitive information like passwords or recovery codes. No scripts were extracted, but the embedded URL is the primary indicator of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/how-to-get-free-coins-on-coin-master-game-hack
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034ac.bin
388c5d506dd67ffb835147ce387370c047cc5b3207df1fc576e413c7744fb734		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34AC 24784 bytes
font_01_sfnt_off00006d8f.bin
51f02da227d0679d4a4cca1b372203100e5a9ff6587b3c267ccf786d3222cbcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8F 17872 bytes

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