Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf24e02de4cbc80…

MALICIOUS

PDF

75.3 KB Created: 2021-07-12 22:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8ed0e19a84314270dcfa162faec2f9f SHA-1: 61b1dc611680b50f05989df2b88075ceaafc42d9 SHA-256: 2bf24e02de4cbc803417b0f842f4c9aee3439d5d4e89dbb8b4ac9b609922775e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to redirect users to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious activity, possibly through obfuscated JavaScript or other embedded objects.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://philabc.ru/square?utm_term=soccer+drills+for+5+year+olds
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9421e0c99b3eb2d3e886/1626117153732/expensive_exotic_cats.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec79c240121f566898f581/1626110402287/organizational_behavior_case_studies_with_answers.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_off0000c8cf.bin
5bd41a7757fc28d39f1947ec4b47654d65148b26491ca375293a33757821343a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8CF 15784 bytes
font_01_sfnt_off0000f156.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF156 16792 bytes
font_02_sfnt_off0001096d.bin
2d97221fe0255583142b7fb8e75ff99dd4756ff7959fae4fd9ba81d4a06b611a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 10588 bytes

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