Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa72012ccec6ce3f…

MALICIOUS

PDF

78.3 KB Created: 2021-07-15 20:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 15ada25fe457002b432545d6c1be0a83 SHA-1: df6c5c2a34794ac42319c1e49524486094407c49 SHA-256: aa72012ccec6ce3f8c9428deeddd39160b6ad996f43b75f01583185fee046ce8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, specifically as a 'Pdf.Phishing.Trojan'. While no document body or scripts were directly readable, the presence of embedded URLs and the overall detection suggest a phishing attempt. The PDF structure itself, combined with the detection name, points towards a malicious document designed to trick users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8621

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/razvivatel/yapz/~3/NsX9ihectO0/square?utm_term=dylans+the+kings+arms
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8cf26b166174ac2d6a216/1625870118768/weightlifting_comparison_chart.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60effdd5bae8d04216d59753/1626340821981/after_blenheim_treasure_trove_workbook_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edb57a834e745de9d2f6a2/1626191226929/41398322388.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3b14df274736e0ab7365/1626225428546/faneguxu.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee5a5164675e3b9de33863/1626233425800/74418815987.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_off0000cee9.bin
bf478939126c9ba3af7606f0b68748d30834c2e9bc33d669b163866a99561fea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 10644 bytes
font_01_sfnt_off0000e71f.bin
657f29ceb0ac17fb6d21f317f5e424cc82d5f9eae229a6df6d17da7f54c5862f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 17604 bytes
font_02_sfnt_off00011552.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11552 16792 bytes

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