Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea19629488326c59…

MALICIOUS

PDF

73.6 KB Created: 2021-07-14 00:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9d1a14887ad45e53e4b2d5efcc2698b SHA-1: 4da05ce6b4c7311a61cdada0becd46e34112e7b8 SHA-256: ea19629488326c5943407c56e6467e7ca90c7eeda885a707ba50a9a0f1e2f975
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. An external URI pointing to 'chcial.ru' was extracted, which is suspicious and likely serves as a lure. While no scripts were explicitly extracted, PDFs can embed JavaScript for malicious actions, and the presence of a phishing-related detection warrants a high confidence assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3118

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=employee+productivity+tracker+excel+template
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edb9327d02012a3634e33f/1626192178626/hard_boiled_eggs_time_boiling_water.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92ca33ba7d954d546932e/1625894051704/how_to_get_free_keys_in_choices_without_downloading_apps.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_off0000c1e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1E7 16792 bytes
font_01_sfnt_off0000d9f9.bin
999c7f095a0c335abd64160ac8d971391134b9df465a33f5f545848ac2994326		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F9 14916 bytes
font_02_sfnt_off0000ff8c.bin
b25a98e28fbbf086652cf4c85fdf54b6c10cf0f6f3ff18a39d011aab5cfb7cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8C 10860 bytes

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