Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca876f7d84685cc…

MALICIOUS

PDF

241.5 KB Created: 2021-04-04 19:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8f0a1a7e0057329656fefe3121287a77 SHA-1: 9a664b15970908e242dccf66d9ee9c66e3b0aa35 SHA-256: dca876f7d84685ccb5002f1411da96d530155913fef928832a53370f84473d3c
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ClamAV with a specific phishing signature related to Roblox hacks. It contains an external URI pointing to a suspicious domain that likely hosts a payload, and a heuristic indicates a visual download button lure. The PDF structure and the presence of an external URI suggest an attempt to trick the user into downloading and executing a secondary malicious file, likely for exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.0190

Heuristics 4

  • ClamAV: Pdf.Phishing.Roblox062100-9873116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Roblox062100-9873116-0
  • 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 http://gaminggenerator.org/app/431946152/dll-roblox-hack-february-2021 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_off000367a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x367A7 24800 bytes
SHA-256: 76ddc31c192bae0c0b4bd5c122ff0873e06eb38ba43c5f1b103a2d997c808d0d
font_01_sfnt_off00039ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39FF0 18608 bytes
SHA-256: ffff9ef8c47be79ffebf1f88cee03ee3738b13dcb5316814237c69c5966f8246

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