Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d2e5f4009095e74…

MALICIOUS

PDF

74.0 KB Created: 2021-07-12 23:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1002ff4470a39b786dfcce5523860402 SHA-1: d68b419ff38a97c0e14d019bf746eaa7c50d4780 SHA-256: 9d2e5f4009095e74cee50f0000fec6ebbae7d9cfc1c36d1992ccd0f1005cec85
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The heuristic firings indicate the presence of external URIs and embedded URLs within the PDF document. The document body is heavily obfuscated, but the overall structure and the identified URL suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/square?utm_term=major+theories+of+communication
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d1de7b6862240d0986b6/1625870814485/29496306733.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7b5118ad60325f0c441bf/1625797905274/excel_compound_growth.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_off0000c605.bin
17d9baf21f7f799f0a8315d7a93af6d2b9abc07644315eea12bb4ded8cb9c058		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC605 10776 bytes
font_01_sfnt_off0000dea6.bin
5187326d49ce4cccad683a32b23c02dbecca8314df3e01a4986549567fcc4574		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA6 14932 bytes
font_02_sfnt_off00010449.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10449 16792 bytes

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