Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dad594c666c3f20…

MALICIOUS

PDF

78.4 KB Created: 2021-07-12 22:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a414ed59cc502244eaac8cb979a1bac3 SHA-1: fc2e685a6cc624b960cceb3fc6114d303c0265eb SHA-256: 1dad594c666c3f20aaf775f9c07358e02a3116a4a6b2452de03e8ddb8897b67d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature, indicating a phishing attempt. It contains embedded URLs, one of which is associated with a known benign domain, but the overall context and detection signature point to malicious intent. The PDF structure and embedded content suggest it was likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

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=electric+field+notes
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7ef16687a3d659a4cdbb7/1625812758994/jamieson_fausset_brown_commentary.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_off0000d526.bin
b2af817515eee8e73d027fc2b4810fd4efd728111ef60a0d05a4f5c91941a1dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD526 10292 bytes
font_01_sfnt_off0000ec68.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC68 16792 bytes
font_02_sfnt_off0001047a.bin
0f9657497567908f05af7d57a16bcb93f668def7f9a5e15c956d1064e77f8e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 16240 bytes

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