Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a73421535e1ea7…

MALICIOUS

PDF

90.5 KB Created: 2021-07-17 03:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 881f833f68bfadcb86c0fe7b3a395247 SHA-1: a01fca8cfe1eb0c12bd9b6398ccaf5b9e2683fd5 SHA-256: 93a73421535e1ea740c1991655856102cba9aa4549cabe5806880910ff44a144
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URI that points to a URL disguised as search results, likely intended to trick the user into visiting a malicious site. ClamAV also detected this file as a phishing trojan. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

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/~3/5Aj-mlxkUx8/square?utm_term=basic+knowledge+of+accounts+for+interview
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7d1acdbb92d34f5ae4003/1625805229021/simple_yoga_poses.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60efd2da5740a719f4aa44a8/1626329818895/sisufafuvopop.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_off0001019b.bin
769729e3d1bcc7547b386d264ff04b0ce58eea06c07662b9aee831df85a3569d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1019B 16448 bytes
font_01_sfnt_off00012c41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C41 16792 bytes
font_02_sfnt_off00014458.bin
3aab72553b33f978f292266d51e6c02a5918b38417f3b548dd1e7a459370558d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14458 11048 bytes

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