Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a492833b9a0a158…

MALICIOUS

PDF

73.3 KB Created: 2021-07-13 21:22:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f06a6afa42751afcc236e7f063209164 SHA-1: 8a1f1836d197065ea475fde783631819f279d4b2 SHA-256: 9a492833b9a0a15832ebb419b893bfcd30e98987aa428c76c7c91eff2be44f0f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. An external URI was found embedded within the PDF, which is a common technique for phishing lures. While the document body is heavily obfuscated and unreadable, the presence of an embedded URL suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1536

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://feedproxy.google.com/~r/sq/ugae/~3/AnJPYMJXbyQ/square?utm_term=8.25+divided+by+3
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7acedcef4a49b3a9f058/1626110670815/wazivikebikazotumikoxo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1df.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 16792 bytes
font_01_sfnt_off0000d9f1.bin
074ad9476bfde77314ee1f978f6bfa5e4ee639934a5c0a21df956c7787e941e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F1 15904 bytes
font_02_sfnt_off000102a7.bin
f14083ff4be3fa19638f01c15617617a29bd099904d225edc459a1104febec7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 10364 bytes

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