Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16a44e8f491f657…

MALICIOUS

PDF

240.6 KB Created: 2021-04-04 19:47:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 58eebf8f52fe44feaf538165a1968d43 SHA-1: 97c4c33bde820736b405ca6b05544ce6ef35354f SHA-256: b16a44e8f491f657731610c2ed694cbcf00d16cffb4dffb77454dede809a1563
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a specific signature indicating phishing related to Roblox. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The presence of a 'download button' heuristic further supports the lure aspect of the attack.

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/hacking-troll-2021-ultimate-driving-cars-review-roblox 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_off00035f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F43 25096 bytes
SHA-256: 9cc84679e6aaa64142af16656ef868f282e448beeb9ed363067cd0aea3f668d1
font_01_sfnt_off000398cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x398CD 19712 bytes
SHA-256: 5df7be10c34d22796d8e9de723ce3bbd9e8c6ae9b05fd344c6e3493631496aac

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