Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0faad4d31c5ac3…

MALICIOUS

PDF

34.6 KB Created: 2021-05-21 01:11:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bfe4b7afb141849161a5fa090f53b8e2 SHA-1: caede7177a948cb4b0e54f670306ee9372362c9b SHA-256: fe0faad4d31c5ac342c13a3c2074af4fe0e6c7a5a2d156b03dc9f84161422768
112 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Roblox Free Robux Hack" and displays a fake CAPTCHA, a common tactic to trick users into executing malicious actions. It also explicitly requests secret recovery phrases, indicating a credential harvesting attempt. The embedded URL points to a suspicious domain associated with this lure, suggesting it may lead to a payload download or further phishing attempts.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

Heuristics 5

  • 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.
  • 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/roblox-free-robux-hack-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_off00002b28.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B28 25516 bytes
SHA-256: 55a96606bf883f9344f68c2e274302aba8b861ace7d13093b0ad81ccbc6fd64b
font_01_sfnt_off0000659b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659B 18488 bytes
SHA-256: 44072fbb5c45a7604268a2c6438126b7db3492802a9c8847ecb07522db400813

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