Malicious PDF — malware analysis report

Static analysis result for SHA-256 8205c9e44a63347f…

MALICIOUS

PDF

73.6 KB Created: 2021-07-17 08:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 40ea4ebca45604f8223e65a9a5116c96 SHA-1: 794a8764e39318f363eed4a0ef609461a70479c9 SHA-256: 8205c9e44a63347f92d1607a77fa242b8625ed50418749c1fd771984970b16d4
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic indicates a lure to download content. While most extracted URLs are benign, the PDF structure and the critical ClamAV detection strongly suggest a phishing or trojan delivery mechanism. No scripts were extracted, limiting further analysis of the payload delivery method.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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/~3/5Aj-mlxkUx8/square?utm_term=o+sound+words+three+letter PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec86d6d0153e73bf8c3216/1626113750428/which_type_of_roof.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7a56c52059f1ec1e10794/1625793900883/59668680621.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7D 16400 bytes
SHA-256: 572a3e043f0d6d6c87799d250d0328e98e8837351da968dc5603cad9f6953477
font_01_sfnt_off0000ea08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA08 10304 bytes
SHA-256: 5db554bdb3c1fccaac2bfcf0e4e369be7337501f7a1a8eb542f7dea47d0e0f43
font_02_sfnt_off00010145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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