Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8b833f5afa5e2a…

MALICIOUS

PDF

36.4 KB Created: 2021-05-25 08:00:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d599bd3d7ae115c72c0d9bf0f1c840fd SHA-1: 48c2eb5d2602ad1d0d776a06da5386d822d9b21a SHA-256: 0e8b833f5afa5e2a2f03caa6934d7d13c0f668dabf1c22e6c7bd0cda4e6958b3
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Free Robux' and a call-to-action to download a generator. It embeds a URL that likely leads to a second-stage payload. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to phish for user credentials or recovery secrets.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/free-robux-no-human-verification-or-survey-2021-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002db5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DB5 26036 bytes
SHA-256: 206b5c295de2c40d87fe1e977fc029e65a6017e845a8b31b215224063bad0d5c
font_01_sfnt_off0000695a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695A 19556 bytes
SHA-256: 08b2a18d96b3566ec838f0e87c4bb916e955b8f8af04b9064418114d078945b8

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