Malicious PDF — malware analysis report

Static analysis result for SHA-256 06bdce33811ee8ba…

MALICIOUS

PDF

75.3 KB Created: 2021-07-14 00:57:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3be0793c47ff98afab61ee4aacca6db SHA-1: e852474767ed5d0aeec49c806e45437e6a94fd60 SHA-256: 06bdce33811ee8bad4473677fdf903c379087e3c9172d906162dab32a1d886a5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that points to a suspicious domain, flagged by heuristics as a potential phishing or malicious site. ClamAV also detected this file as a malicious PDF. The presence of an external URI and the ML classifier output strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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://synerhu.ru/square?utm_term=direct+to+indirect+speech+quiz
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7d8940121f566899545a/1626111369669/90825955580.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8b52e94d7a30e05603d5/1626114898821/computer_mcqs_with_answers_free_download.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec83a867baa26076bbbfef/1626112936772/pixitowekalijesof.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_off0000c696.bin
42e883f1d2f115ebda382984bf4d40e839abb8e8750a27322a158e624ee9de10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC696 10708 bytes
font_01_sfnt_off0000deed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEED 16792 bytes
font_02_sfnt_off0000f6ff.bin
46cae619312d0f6df6f8af05c9ea19720cc07c473fb3412e8c0e7759cd47b914		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 15984 bytes

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