Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e64aa5d6964a34…

MALICIOUS

PDF

80.7 KB Created: 2021-07-15 10:18:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1573af32ae3eb40923b840a60b8c0952 SHA-1: 008d1201573710f959aa324187e3d5de193ded4f SHA-256: 70e64aa5d6964a34d4b11db8f1d5db4fc037cec48782c36a7ed2df58670ff390
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL that directs users 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 malicious classification strongly suggest a phishing attempt to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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://krisoc.ru/square?utm_term=1.78+m+in+feet+and+inches+height
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e942eb8ce0e10532d3b670/1625899755082/basic_of_financial_accounting.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9015692abcc18c4f49ca0/1625882966767/3857_s_king_drive.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee76d8e7148d06bc7444ca/1626240728595/grand_jury_indictments_today.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_off0000d99c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99C 16792 bytes
font_01_sfnt_off0000f1ae.bin
d6839b88466073aadece233c4d195a979f572802fa3b1d7576e22da088a917a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 17020 bytes
font_02_sfnt_off00011e16.bin
f537964c5541998043653ce61476c09f6cea77252a01ac3810cb775ac2f474a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E16 10936 bytes

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