Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb65b9a042f95e5b…

MALICIOUS

PDF

73.2 KB Created: 2021-07-13 23:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cf7560bc4b72c4ff36ac82aabb091d3c SHA-1: 841a1ff14f5def31a7af0a6ec931162f416c5a30 SHA-256: eb65b9a042f95e5b5c2a272b5a84817cee7d421beecd65703e984df12c23e563
74 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. The document body contains garbled text, but heuristic analysis indicates the presence of urgency lures, suggesting a phishing or scam attempt. Several external URLs were extracted, though most are confirmed benign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2209

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/-MXWpcYQ7kA/square?utm_term=class+6+history+chapter+11+question+answer
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb0de5e50ea0df8e20244/1626190046662/43927745668.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7704d0153e73bf8a8bf0/1626109700854/72561541599.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_off0000bac0.bin
7b0259f8b69199210642e6dacd43c31669e5cb153f8df3a7cfa04238df6c42f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC0 16812 bytes
font_01_sfnt_off0000e689.bin
274342283de21b84352588ad1f6ab836f609bf01cd7c94e7e9747ad72eafb6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE689 11168 bytes
font_02_sfnt_off000100c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100C8 16792 bytes

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