Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc687c7292b7df05…

MALICIOUS

PDF

75.4 KB Created: 2021-07-14 06:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 077a0923e827f6dee4dcdaa7af256a94 SHA-1: add0fe7ba694b90c61e7a7cd854be0addb979f89 SHA-256: fc687c7292b7df05bf65739432738b8aa6a28fb938b4a67e167798d32436b8bc
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. It contains an embedded URI pointing to 'medvor.ru', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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://medvor.ru/square?utm_term=72+donk+for+sale
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e907dc025aa46e30d1b8e4/1625884636666/marriage_alliance_meaning.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec81c0947cc46ca1285ebb/1626112449046/59607183240.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edbaad221ba579b7476916/1626192557625/geography_picture_quiz_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2c813753dc428c872553/1626221697398/bses_instant_bill.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_off0000c7fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FE 16792 bytes
font_01_sfnt_off0000e015.bin
b7c4109bbf40b9edbdfd7b2c9ada9e59e6196703d16ec4e199c147f0c990ed79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 10324 bytes
font_02_sfnt_off0000f797.bin
420fb3ed253c30cc0a5a08d20a019cf095e4441009a4cbf5d8d6bee475a5965b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF797 16364 bytes

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