Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4b5a919e545d75…

MALICIOUS

PDF

79.1 KB Created: 2021-07-15 15:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a28366057dcb9f87b153b6467be5520d SHA-1: 724aab7331e0a3dc26f6f547b2deeb852d63301e SHA-256: fb4b5a919e545d75ec11febc9afd6cf17c94d1269b560c66515c574cd9b93e1d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URI pointing to a suspicious URL. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The embedded URI likely serves as a lure to redirect the user to a phishing or malware distribution site. No scripts were extracted, but the presence of an embedded URI and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

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://feedproxy.google.com/~r/sq/ugae/~3/cEZ-xJcQpFE/square?utm_term=another+word+for+clear+vision
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec83c5cc9768212242c6a3/1626112965273/63377819132.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edeb6de83f616bcf8436d9/1626205037331/35920526652.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_off0000d6c0.bin
e729ea9f06f5f55d9d89fb6f993b15df0795466fb65c14a92135e6f1980fc7c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C0 10708 bytes
font_01_sfnt_off0000ef59.bin
dd5c9d55b1fb94ffc3985f6fafc26a9fc5f0e1995be7bc889a7ca2db4235aca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF59 16056 bytes
font_02_sfnt_off000118bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118BC 16792 bytes

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