Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2352f3537d06424…

MALICIOUS

PDF

72.8 KB Created: 2021-07-18 17:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 925641acdb078eb904053bdcb8aaa112 SHA-1: c12395c44095a59df326e6d72e3ab25a9a073b60 SHA-256: e2352f3537d064243851d80e0ce213c4ddcf08f098c45cf6cb157d87a798048f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, specifically as a phishing trojan. It contains an embedded URI that, while flagged as benign, is part of a lure related to 'ict projects for students'. The PDF structure and embedded objects suggest it's designed to exploit PDF vulnerabilities or trick users into visiting external links. No scripts were extracted, but the presence of embedded URLs and the ClamAV detection strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

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://feedproxy.google.com/~r/sq/ugae/~3/u8n3KCQdUYc/square?utm_term=ict+projects+for+students+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e80c0bafd06e4982ec3e65/1625820172256/nadonakupikix.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc5dcad58ca03d224215b/1626195421095/makimugivesita.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_off0000be6d.bin
a77eaf0ec9b78026a111b89886e312017b4f8d32179ac6a9389ffb77ed5fd25e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6D 10492 bytes
font_01_sfnt_off0000d66f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD66F 16792 bytes
font_02_sfnt_off0000ee81.bin
bc5a0d6c74c3abeb1b11c5c491da7360b48776a954cbf34af54f45fe197bd08d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 16280 bytes

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