Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bac0a34d4ea2fd…

MALICIOUS

PDF

78.2 KB Created: 2021-07-12 20:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f42883c4e97184d33060aee0843f3ea5 SHA-1: 2fc4b0546be5872abc4fe110911f8fbf40384be8 SHA-256: 78bac0a34d4ea2fd0cfe0ad3860a895f7b645d378bc845c24035b15185a41820
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. The embedded URL, while appearing benign in reputation, is likely part of a phishing lure to direct users to a malicious site. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of embedded URLs and the overall detection suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

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://feedproxy.google.com/~r/sq/ugae/~3/iCUEKX862tE/square?utm_term=how+to+insert+a+photo+into+a+pdf+mac
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93a6fc14ff043cd5dba69/1625897583802/64703441531.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec77f2fd54eb0708249cf4/1626109938264/how_to_find_towns_in_minecraft.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e92d78f107ff2467e978ce/1625894264449/35607954530.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec76e0a3e9df788e6c13c5/1626109664681/toditilo.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7701668ba31612b4b4cd/1626109697868/92323329647.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f29258c6623f037fe478/1625879187129/81220557726.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec71adfe0477279409b0d9/1626108333793/westbrook_manor_apartments.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e87ac8d5ac3b783db43cf4/1625848520641/iphone_11_max_pro_user_guide.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e908a1c0906550d90a3fe1/1625884833668/37219658758.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_off0000cd7d.bin
e5262595741b4762ed8104237fe607e9a0f7889bd5e482c55caf1717298bcc5d
pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7D 10916 bytes
font_01_sfnt_off0000e6a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A1 16792 bytes
font_02_sfnt_off0000feb3.bin
801cf1041a2be4ed5e143949fadc02594d0c1dc3ce8d575d9ad436b2ec7663be
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB3 17448 bytes