Malicious PDF — malware analysis report

Static analysis result for SHA-256 6901b02530ebb810…

MALICIOUS

PDF

93.3 KB Created: 2021-07-16 19:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b9b3dae341e41d278daa36d40dcc218 SHA-1: 72c983191bdbb72261f70d648597f85fac5f5713 SHA-256: 6901b02530ebb810fa357a07d4d0d1dfe1901ce41c1423125e28eed8d79862eb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as malicious and a machine learning classifier indicated a high probability of maliciousness. An external URI was detected within the PDF's metadata, pointing to a URL that, while currently marked as benign, was likely intended to host a malicious payload or phishing content. The presence of embedded fonts and duplicate object bodies are common obfuscation techniques in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/razvivatel/yapz/~3/7R6buoffwiA/square?utm_term=moving+to+quebec+from+us
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0d963f32be22f00728658/1626397027551/idly_dosa_for_you.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee154c84a0477e84a855f7/1626215756306/zukitesetopuvilojik.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f117fce7c78223958810a2/1626413052564/treatment_for_hashimotos_with_normal_tsh.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f13394d1d8e65aae872c5d/1626420116194/rinijevesuvuxifuzuduse.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_off00010860.bin
6d626cc6bfd428e613c0552b3180d25ab1c904887b2407045e65df7a432de87c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10860 10916 bytes
font_01_sfnt_off0001216c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16792 bytes
font_02_sfnt_off0001397e.bin
c80f46496aa1774f08f6d694f98989f00582c94ae37d23569767002b63ef0de1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1397E 17872 bytes

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