Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd9083b50e5372c7…

MALICIOUS

PDF

81.7 KB Created: 2021-07-14 06:33:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0c1d693d66f0e5fca5445ed04870c28 SHA-1: a4be73772195459ab99bf1d28fce0a9b114c630f SHA-256: cd9083b50e5372c776f8977236cf5a4595964a669ccbea9e9e5c933304bbe0b0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. It contains an embedded URL that points to a resource on squarespace.com, which is likely part of a lure. Although the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution attempt. No scripts were extracted, limiting further analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

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/r_nBws6J8g8/square?utm_term=for+sale+shoreham+by+sea
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8fe2a5ebba154a8fab047/1625882154871/mudegowenuzukanade.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e78b761873c46ac934b957/1625787254888/hoes_for_bros.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_off0000dc5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC5A 16792 bytes
font_01_sfnt_off0000f46c.bin
e69cf7b76c462a30422e9df63d08e07dea73b92594ff342bf4946ac61222d929		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF46C 17420 bytes
font_02_sfnt_off0001224c.bin
65a31d7fd7f6f9eda903f1904c184c6026928f233d58f5806b9defa135bc2e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1224C 10308 bytes

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