Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6195b617523872f…

MALICIOUS

PDF

37.0 KB Created: 2021-05-15 02:30:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 808a5740bb72a4413f7787cfb25814e6 SHA-1: 3f036204c9d3242d91c3f0a31b6ae3d479343b22 SHA-256: b6195b617523872f069b8184132721cc7eacd07c3cc730a75dac43c02564e5ca
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for "Robux Free Robux" and a call to action to "CLICK HERE TO ACCESS ROBLOX GENERATOR", directing the user to a suspicious URL. This strongly suggests a phishing or scam attempt. The heuristic 'SE_SECRET_RECOVERY_LURE' further indicates that the document may be attempting to solicit sensitive information like account credentials.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/robux-free-robux-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_003_off000032bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32BD 27188 bytes
SHA-256: 2edfb26611cdb63ad715f4fc65d33df809e528eaf02bd0c24144bc9b69a65262
font_01_sfnt_off0000700f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x700F 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73