Malicious PDF — malware analysis report

Static analysis result for SHA-256 b68b0776e3108ae9…

MALICIOUS

PDF

100.5 KB Created: 2021-07-12 20:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 054d1fd829323478be38dc7644dc40a8 SHA-1: 828ee3f2ae5c4f3b01d3d8bbea12b0c3e3170e21 SHA-256: b68b0776e3108ae9b001e809976facea91efa7744f300d317e1a9b2c1cef8cd4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. An external URI pointing to 'chcial.ru' was extracted, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of an embedded URI is a strong indicator of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7925

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://chcial.ru/square?utm_term=what+does+morra+mean+in+spanish
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7c67486d8930991a545da/1625802356167/jobazofiv.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec714a72e2584f246153fb/1626108235042/86258222712.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8eb1418245d33f17f1dcf/1625877268881/39842465422.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d67c1651423cab5f3051/1625871996332/66571862571.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8114ffdc75e32ab09b812/1625821519185/car_shows_and_cruise_nights_near_me.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_off00012551.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12551 16792 bytes
font_01_sfnt_off00013d68.bin
2c62653caba0c2cfeb6aedf6ffde93923e5bdca4c2ff966ea86d5457fa43cac7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D68 10604 bytes
font_02_sfnt_off00015570.bin
19e117459d2feb62272f8197e11c00601492ef14d8aca2147ed77b30eda037d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15570 19472 bytes

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