Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf8efd0cf5f15ff7…

MALICIOUS

PDF

36.8 KB Created: 2021-05-17 04:30:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 37ad4eade666c352e94f08bcd3638d8b SHA-1: d1bb82efc6a982695bd8ae88aae3237d7e7805d9 SHA-256: bf8efd0cf5f15ff787c49bbab5e8817f7adc2240e614d703f42a9126fa4b429a
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'Coin Master Free Spins' and an embedded link to a suspicious URL, 'https://netcdn.xyz/app/406889139/coin-master-free-spins-link-blogspot-game-hack'. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may attempt to trick users into revealing sensitive information. The PDF structure and embedded content suggest it's designed to exploit user interest in game-related cheats to drive them to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/coin-master-free-spins-link-blogspot-game-hack
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000035b8.bin
2a2913d765ec2117f8ad17e3d69fcb2c92117595235c7f4c025f2e090c829dff		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35B8 24464 bytes
font_01_sfnt_off00006d6a.bin
bdbf3986ec68ee3b496ae89412d1d0f392e3b826f1ca321ec58289079c9e4546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6A 18632 bytes

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