Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cca0976295ea6c1…

MALICIOUS

PDF

77.1 KB Created: 2021-07-17 09:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 571591298784d8953599b2f9313475c4 SHA-1: bbc305b8ef565133dab7f8a859fd6eefe22e2055 SHA-256: 6cca0976295ea6c11136ac1e083beedee81e7c14f9b8986ebf2d2e53eab31bcf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and heuristics indicate it is designed to exploit vulnerabilities or trick users, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/CcIy6vlvkUk/square?utm_term=uncle+in+christmas+vacation+movie
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8d206598de22e33d26e1a/1625870854713/1_irr_to_usd.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f12a705554232196bcabb3/1626417776538/46193299085.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7cfb402743737595bdc0/1626111227316/nedobopituvagijo.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec786c154eb17b6848e455/1626110060260/liver_ast_meaning.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_off0000cbb8.bin
109a28fc16ed37eba17774695c6fa2eec9f8e996a47423f9133f11448115c809		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB8 17116 bytes
font_01_sfnt_off0000f8a0.bin
a412ef7bdaa6bc1ced7900e35df2e78661eac805b91580df8a87c37d5ab172af		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A0 10568 bytes
font_02_sfnt_off00011095.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11095 16792 bytes

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