Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf004bbeebf4828c…

MALICIOUS

PDF

79.8 KB Created: 2021-07-16 11:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 558ea73d85a6a90410bd0df1aa159bfb SHA-1: ce9eb88054a1263320ba46d023215639de644a34 SHA-256: cf004bbeebf4828cb9b6c098e23841404994854af266321ca4c54b6b3e3a2221
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and contains an embedded URL. This URL, 'https://chcial.ru/square?utm_term=solve+each+compound+inequality', is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

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=solve+each+compound+inequality
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed4d0850bb312daeccaba7/1626164488820/day_6_30_days_of_yoga.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60effcd9bf9aec2111aecc0e/1626340570118/vuvefolijiz.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_off0000d45b.bin
951298a4674cf82dd50b5b9689cf9466b7065fdf748458329b2b00f4b46786a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD45B 11012 bytes
font_01_sfnt_off0000ed92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED92 16792 bytes
font_02_sfnt_off000105a4.bin
a046439359821edbc160c37680236be69ddefaccdb7e50a2c731930801877547		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A4 16952 bytes

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