Malicious PDF — malware analysis report

Static analysis result for SHA-256 34147ad9e661d83f…

MALICIOUS

PDF

79.6 KB Created: 2021-07-12 21:25:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aef5cc4cf4ec434eec6cd0eae2e6622b SHA-1: 903efbb71f4992dd2ca82e4d9d7404acb8e4a220 SHA-256: 34147ad9e661d83fc71d13c5d0243673ae24aba8b1481c1748bf63701e8c0e43
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI and the overall detection suggest a phishing attempt designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6665

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://coretry.ru/square?utm_term=possessive+and+plural+nouns+worksheet
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e964b9cc7c08645928a807/1625908409761/the_dark_tower_laurie_chambers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e918a9320dbd0de280b6c3/1625888937594/lokobiremadosanisomevizat.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e88113a060317fee7485cd/1625850131667/convert_dwg_to_in_autocad.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_off0000cf8c.bin
a631033790e04a56de0b98552b23195092cc2204546c1d03e07241a9f125f6e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF8C 10832 bytes
font_01_sfnt_off0000e88f.bin
1100fd6d6d8b75a3ab9bc7e4e044967ebc596a2d76ce0689061e9b49aac3ed8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE88F 18280 bytes
font_02_sfnt_off000118e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118E6 16792 bytes

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