Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f07849e8ee1dc50…

MALICIOUS

PDF

91.0 KB Created: 2021-07-16 03:14:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5714180c8adfc5570aa2fe0fee542a2 SHA-1: 2b1dd23244946cf14bfd3e8ddb227c133cbd7f79 SHA-256: 8f07849e8ee1dc50dd6de2b76bb1dc3c2f4d1017ba78b419d119b958c6825d78
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers, indicating malicious intent. It contains embedded URLs, suggesting it may be used for phishing or to download further malicious content. The presence of duplicate object bodies and the use of wkhtmltopdf suggest potential obfuscation or exploitation techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/~3/5JeRQhMeIYg/square?utm_term=pdf+of+the+constitution+of+the+united+states
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1a1d0a53c127f5d5e92b/1626216989429/zevofosalanokirowixov.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8b60edc1e6c41866497ac/1625863694287/essential_biology_for_cambridge_igcse_online.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed897a2271a75a72d480f6/1626179962649/23704038760.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7a54760c9e2bcf421a3e/1626110548514/zaluzufipemijuzis.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_off000100dc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100DC 16792 bytes
font_01_sfnt_off000118f3.bin
ea14871c4c16938a2b3ab4bec697154a99af77c730759480519f6446d2b410f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118F3 10528 bytes
font_02_sfnt_off000130de.bin
dddc81e1d803648163d4b72505e8300287234a199b0b4ba9e57b45696a80bfeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130DE 17348 bytes

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