Malicious PDF — malware analysis report

Static analysis result for SHA-256 c173b90ba177c612…

MALICIOUS

PDF

39.3 KB Created: 2021-05-19 18:05:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ac68057984fa1c809009588c425372e5 SHA-1: dd4de0740700e7aed8d4db2ea41733e21bf6acaf SHA-256: c173b90ba177c612bc3e2e66eeb6bda91341bf65b3fdfdc3f16a5a9e4407522b
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure related to 'Free Robux on Roblox' and an embedded URI pointing to a suspicious domain. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to solicit sensitive information like account credentials or recovery codes under the guise of providing the promised reward. No scripts were extracted, but the presence of an external URI and the lure indicate a likely phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/431946152/can-you-get-free-robux-on-roblox-game-hack
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003497.bin
2a0d6e8dcf993cb7f710ec801579dfea8d9fd91a89e069d1dde5d1736ab328dc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3497 24668 bytes
font_01_sfnt_off00006d6e.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6E 2840 bytes
font_02_sfnt_off0000771f.bin
0d0c29456045ba8700eeeb9b5d08ef238a74b3c73615dbb1a220be23830403a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x771F 18580 bytes

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