Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8b77e3201b0b26…

MALICIOUS

PDF

230.5 KB Created: 2021-04-04 16:58:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 079f7c14f71bb3a0827511a31061263b SHA-1: 27e84ff85e903f34dd21ad7691ae3628980a847c SHA-256: ba8b77e3201b0b26c3ec77b1815327d7d445a27baa2c592b5ca0b04d5c93e0bb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as a phishing lure due to its image-heavy nature and the presence of a call-to-action phrase. It contains a suspicious URL that likely leads to a malicious site, as indicated by the ClamAV detection and the heuristic firings. The document's structure suggests it's designed to trick users into downloading or interacting with malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0491

Heuristics 5

  • ClamAV: Pdf.Phishing.Roblox062100-9873116-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Roblox062100-9873116-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 230 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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/roblox-free-complete-game 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
font_00_sfnt_off00034e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34E3C 19144 bytes
SHA-256: b166d0894b7c9a353bfcff9b5a678c4aa670de59aebc398f5b068248ed0f63ae
font_01_sfnt_off00037696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37696 17948 bytes
SHA-256: b2c3d0318f3c58c4ace8ac68e98f8543754ea22a9e930e22fce54c7c203377fe

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