Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc7b35a87c4cc6d…

MALICIOUS

PDF

79.0 KB Created: 2021-07-12 20:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 722b2e1703cf795e29c2862c4f83dd5a SHA-1: 27828ee714482513ffdc134c12661f946e93db05 SHA-256: adc7b35a87c4cc6df6a1ca90e0ccfbf3e22d4f12acdcacdca77bf0a495f6fdb7
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. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or malware. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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://inwebjor.ru/square?utm_term=how+to+run+1.6+km+in+7+minutes
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d3b0a5e1975eb392e281/1625871280629/sweet_good_morning_message.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e91e222210ba6bce1208cd/1625890338263/crooked_creek_subdivision.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df9af4fe78435a3713bb/1625874330036/fortnite_stretched_resolution.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_off0000d3f0.bin
95ca42a34591c7879c1a748db93de55482f71c073fffbf4e46331987b00d2ebf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 10668 bytes
font_01_sfnt_off0000ec94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 16792 bytes
font_02_sfnt_off000104a6.bin
836b8bca234c8b00d1eaeea1f38a04bbd0f6bca4dd445a0337ba2e91f78e0bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 16744 bytes

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