Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02dc820937d5ba8…

MALICIOUS

PDF

76.3 KB Created: 2021-07-12 20:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 29982348ee00a9d00e2b52fe33a6c257 SHA-1: e94b2b30f3dfb3f534bda74683923ca7856de559 SHA-256: f02dc820937d5ba8e24280bac1d2aa8bac06261aedd17e7d3c0c5afdc9aeb093
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a phishing and trojan detection. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure itself does not contain executable scripts, but the presence of the external URI is a strong indicator of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3002

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=assistant+director+roles+and+responsibilities PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e94ac48ce0e10532d3ea28/1625901765043/17709260991.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7693de055dd31fd067685/1625778493855/dos_batch_file_variables.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FF 16380 bytes
SHA-256: 633a3a1a5654c57a8b4e80be2017b7153f84a3a1679d3db3273c2583fbbefebf
font_02_sfnt_off00010b48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B48 10628 bytes
SHA-256: d11ee865ad3f96d1fd1c86588b9794aa54a7598658ae8c740d6e74b1b8480422

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