Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd9cc68d72ce176…

MALICIOUS

PDF

77.3 KB Created: 2021-07-17 08:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e78376a4cfff769198114915278d10ca SHA-1: 957d529111a604bba032b254c3ca211902394876 SHA-256: 8dd9cc68d72ce1767f447f16726be183996511f7aa64518ff0fa7c6237906a08
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it aims to redirect users to potentially harmful content. The presence of an external URI points towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

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/mHcMeCcfVl0/square?utm_term=ending+therapy+transference
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee28428685745b7d137223/1626220610639/32752214504.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f18576f9088a713e6e04f8/1626441078579/how_to_change_colour_of_signature_in.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d1060cb99a3e7b6541b9/1625870598235/87802561700.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60effe7379f953043cbe533c/1626340979857/graph_terminology_in_data_structure.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0d4140a71fd0da9a8ff03/1626395668311/matuluwofem.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7b8c288cf71862a8c3fb/1626110860426/duo_factor_authentication.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e87526c2683467d4f27be5/1625847079064/xuzebakutuvawotutenag.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_off0000cee1.bin
5011ed848684ed2f2847806b1395ce5bb860e474c889d29e8b86c0282c29f6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE1 16128 bytes
font_01_sfnt_off0000f892.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 16792 bytes
font_02_sfnt_off000110a9.bin
ad3e9b8d84ad6bca75e1fd6f7310a84dbd7e5342208bf7d5acc161a09924f8a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110A9 10828 bytes

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