Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ea2b382eb14ce4…

MALICIOUS

PDF

78.9 KB Created: 2021-07-17 19:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c67c7bc3398bc21ece3faa26a4d27fac SHA-1: dfcd7c1f8d57a5ad74766130a98185aa901d3725 SHA-256: 47ea2b382eb14ce40cbb4039585b0eb973badbb9b4e594adca33f6612e56b8d5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure the user to external resources. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' strongly point towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6665

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/CHqDoFjlE84/square?utm_term=graphic+novel+panel+templates
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94b67309bd63f3d8754be/1625901927764/healthy_muscle_mass_percentage_chart.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efde1b91893d3c03941994/1626332699932/18792171519.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1f2173efe2b361361a9fe/1626468887665/84443376531.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_off0000d21c.bin
198aea163d61370cae3fd1ca9ae76d3d46b8b3f5d056548e2f8affb1da3ca856		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD21C 10744 bytes
font_01_sfnt_off0000eaab.bin
690c423b15d442f5100b5e1de02443c2ddeb4cd4b28cbb7acfe95f4c87b30f35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAB 16680 bytes
font_02_sfnt_off0001163a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1163A 16792 bytes

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