Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f0faeb88004c64…

MALICIOUS

PDF

90.7 KB Created: 2021-07-13 21:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 993b860604dcb1b6e992fdce97caeb46 SHA-1: f3476ba21bdff4af10413d552d9c9e2896ac7c13 SHA-256: e5f0faeb88004c646ad1d38465c624adb0db51e67c349e5a701f6f57019f723d
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though many are marked as benign, suggests potential phishing or redirection capabilities. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' strongly point towards a threat delivery or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/~3/0YvHz_IItD0/square?utm_term=rendition+of+a+song
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca7085f8bf969072150c6/1626121992467/savanadagula.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8ffd12a6f785f5832ea63/1625882577338/jedidano.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed8e41f67381323ef9285b/1626181185421/godetu.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_off00010353.bin
bc304dc373ef4b80060f80e30c63fd90f947b6896ef027fe5c756bf5ab497234		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10353 17088 bytes
font_01_sfnt_off00012fe8.bin
4036947048ccbf236ef57f485b8dc1770008b9e9dbaa60b80c4403f3e4c1a298		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE8 10428 bytes
font_02_sfnt_off00014780.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14780 16792 bytes

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