Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6873d1519ef09e…

MALICIOUS

PDF

102.6 KB Created: 2021-07-12 21:23:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: bd24780b82c90618d05ac8d7eabf7fed SHA-1: 30ef5386ff2759c694aa11a3a5eede50389dd7d1 SHA-256: 9e6873d1519ef09e144191cd1d817fb171e603fca99880867e45985dca28c6cc
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URI pointing to 'https://synerhu.ru/square?utm_term=kiss+me+there+she+goes+version', which is likely part of a phishing attempt. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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://synerhu.ru/square?utm_term=kiss+me+there+she+goes+version PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8172a1f8f93f64ab96f1/1626112370298/the_green_field.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116D0 16276 bytes
SHA-256: f200293808f6dfdec89f1f082306738c3ed3a6184eaa0a147dcf690413c39718
font_01_sfnt_off00012cd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD6 10404 bytes
SHA-256: 728beeed27d028d75c23055ed674b2d812a39ce9189e7be381ff2a7cd9319e5e
font_02_sfnt_off00014438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14438 18464 bytes
SHA-256: 48156d81cd979b6849e973fca92ecad1695ae5b3a9390d3f4639ce42b01d55db
font_03_sfnt_off000174c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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