Malicious PDF — malware analysis report

Static analysis result for SHA-256 9892a0647079247e…

MALICIOUS

PDF

79.6 KB Created: 2021-07-17 03:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1b6cb233be9f1f8df8a0f0212bc3e3f SHA-1: 3c515d4dbc787a79d03f2ef6b4f46c180d2c9cc4 SHA-256: 9892a0647079247e29e04ba649c802b8e7d8af558472454aa006421f3e396634
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or malware distribution attempt, likely leveraging a known exploit to execute a payload. The file's structure and detection patterns are consistent with malware designed to lure users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/iYdez4bKglI/square?utm_term=find+the+multiplier+for+11.8+growth
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f164166186c4310045a710/1626432534404/buttermilk_from_curd.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1f54003e0235aaf4c9b00/1626469696923/marfan_syndrome_mitral_valve_prolapse.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edee3c3be50f2c5daf54f9/1626205756846/weapon_pricing_guide_fallout_76.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_off0000d3b6.bin
90fff484529993df619523ec4fbef66a9262828f926d0cef18a0ed97d52e1427		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B6 17256 bytes
font_01_sfnt_off000100f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 16792 bytes
font_02_sfnt_off00011910.bin
4f952358165f4319b2c9847fd4e59061f8117df96f857e846c803796c5d16f13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11910 11104 bytes

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