Malicious PDF — malware analysis report

Static analysis result for SHA-256 9021c0b38038b30e…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 15:36:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c71516c510a849d1fec150001b4336d SHA-1: aaae18e5a8e1c64b1c3e66e7e6467947803cd3eb SHA-256: 9021c0b38038b30e9648c9e20014b9aeda12c8c36e80289c791441e6d09a0757
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. ClamAV detection confirms its malicious nature, identifying it as Pdf.Phishing.Trojan. The presence of embedded URLs and the overall detection pattern suggest a phishing attack vector, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2686

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://chcial.ru/square?utm_term=college+physics+serway+9th+edition+solutions+manual+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7a6f3a853d606aeb7754/1626110575839/2_player_golf_card_game.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9429592abcc18c4f72df8/1625899669378/rikawakupaxokupesetamob.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_off0000bfac.bin
52d0a87931cec6a8c5d0b1261e28e3a0212a09abfdbd55c79ca84b1be2a643ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAC 16384 bytes
font_01_sfnt_off0000ea4a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4A 16792 bytes
font_02_sfnt_off00010261.bin
71fb9364b6bd288455ab7c3f4ae62393a20380f5f50aa06f1e4b665366c05c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 11564 bytes

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