Malicious PDF — malware analysis report

Static analysis result for SHA-256 16575a2a82cb8802…

MALICIOUS

PDF

80.6 KB Created: 2021-07-13 21:36:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00e8bb0e9041ad2a0df97947ca1d3285 SHA-1: e34c173970ca2966cfdd0842741b07daddf2e83c SHA-256: 16575a2a82cb8802f47d76f03cefe6d75ab73ccd69b92b6fc336a2dcf935570d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'medvor.ru', which is likely used for phishing or to download a secondary payload. The PDF structure and embedded content suggest it's designed to trick the user into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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=to+whom+it+may+concern+resume
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edca38d9d5ad70ebd02edd/1626196536781/apa_7th_edition_referencing.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edbfefb0089c62dc3adb48/1626193903438/48929881934.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb7cbc8cbd011b90e5255/1626191819213/lizotojozomupinotete.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed297aaf5561712122c08b/1626155386427/55747407590.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_off0000d6d5.bin
6929dc95b19c3592d5eaf0501c4df4423309d88375a3b1b95dae20538d224e01		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D5 10712 bytes
font_01_sfnt_off0000ef69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 16792 bytes
font_02_sfnt_off0001077b.bin
731847022befcd0e173f12a59fdfb4ef1ab826a8c918c4e04d64378b46dbc704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1077B 17884 bytes

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