Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c953eb5d1ed6d3…

MALICIOUS

PDF

78.8 KB Created: 2021-07-19 00:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da774a365061cb7e7bbaea5bc5749a83 SHA-1: 58a65c35c64a69804ded505c6f49472434cc10df SHA-256: a6c953eb5d1ed6d39cc6dc4f09e864cf9a6e2d0724d5f3cde2d3f41ffae74845
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, even those confirmed benign, suggests an attempt to lure users to external resources. The file's structure and detection patterns align with typical phishing or malware distribution schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/-MXWpcYQ7kA/square?utm_term=institute+of+taxation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3c8efa9adb72803abc8fc/1626589424139/janome_sewist_525s_instruction_manual.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f06a7ba5088e059141eb9e/1626368636016/support_guide_iphone.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efd6dcfdf156014348c9d0/1626330844299/76818451870.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e88ab8ea4f6832d9c6b6d7/1625852600358/endocrine_and_exocrine_glands_examples.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_off0000d3b3.bin
03258c844e50b9f61c4e1955c1d41d8068c1ce6f8e5ac750788c54816f3bd622		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B3 17048 bytes
font_01_sfnt_off0001003d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1003D 16792 bytes
font_02_sfnt_off00011854.bin
74059d84fff9c3940c1d7d538c934057aa42d381626cbed21cf3c449aa2602e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 10212 bytes

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