Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefe7d6f94d3470d…

MALICIOUS

PDF

80.7 KB Created: 2021-07-14 02:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61aa72158b0cb157e690b23a6354612a SHA-1: 3840436b560cadf3fb4e51f706c682f5f2b7009e SHA-256: eefe7d6f94d3470dbb88fa93e03284552d1859a1b9b7f7b60d5c5b67051c31c5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI, https://infrive.ru/square?utm_term=goat+feed+concentrate+formula+pdf, was extracted, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a malicious intent to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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://infrive.ru/square?utm_term=goat+feed+concentrate+formula+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee0e13f72ce0266e0c00e3/1626213907442/57175511674.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e943165ebba154a8fd6cb0/1625899799065/67778864651.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e44637da2614570ac46b/1625875527030/pure_substance_definition_and_example.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_off0000da72.bin
822f8297abaf726b5e9ef9d45e0c1458ac1eb6f80685aa4ea63636d9005ff640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA72 16916 bytes
font_01_sfnt_off000106c0.bin
06e1b39228ef5b460baaa5f82dbfc0748073cd9e3032f8eff02687e02ccefb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C0 10660 bytes
font_02_sfnt_off00011f33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F33 16792 bytes

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