Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae98656e41d1e0d…

MALICIOUS

PDF

75.0 KB Created: 2021-07-17 00:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d97eb70f38444d4a9deb918971589de6 SHA-1: fc217de8409083c190bf8bf9a46c59b936d73570 SHA-256: fae98656e41d1e0d6296fb545afb1d55b884317e18369bdfd88201dd1d631643
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as a phishing trojan. The presence of embedded URLs, though many are marked as benign, suggests an attempt to lure the user to malicious sites. The file's structure and detection as a trojan indicate it likely exploits PDF vulnerabilities to execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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/EjZ5HCEZs_A/square?utm_term=proof+for+sine+rule
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0caf25554232196b73c73/1626393331015/57255263800.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec87365978cb5ccaab2929/1626113846439/kokoremo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1f5931089210c1d6aca7e/1626469779769/financial_management_policy_manual.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec92847a6a16267649d31c/1626116741192/sepib.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8c073eebddd6e48ecf4c4/1625866355856/free_online_conversion_of_to_excel.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc0c5d9d5ad70ebcf2b52/1626194117760/saying_ignorance_is_bliss.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92bbc27127e680416560c/1625893821164/groin_muscle_location.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8baa94c181567023b9e52/1625864873941/tozaxumadafaxovobizetekuk.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_off0000c7ac.bin
e0469c70126b87b62c42987155db77bf74ca9930eaf4eb86e1c0dfba3ebac404		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AC 10048 bytes
font_01_sfnt_off0000de16.bin
6db739fe3cd04d0a8d2dcb8de9c7a6527787aff82bc5cb5c8b097c7b0b4f9ef0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE16 16176 bytes
font_02_sfnt_off00010820.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10820 16792 bytes

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