Malicious PDF — malware analysis report

Static analysis result for SHA-256 87dc54c2b6829df9…

MALICIOUS

PDF

81.4 KB Created: 2021-07-13 16:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9d7a3d3e286aac6a9830477c04592aec SHA-1: 2aef69be12f45df877b32f4fd8773436974b5924 SHA-256: 87dc54c2b6829df9c20b3a412c5ae1d835434681262b7b68bf7d6a99720024b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded link disguised as a news article. The ClamAV detection and ML classifier indicate malicious intent, likely phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5817

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/~3/4Ji06Fp1PxY/square?utm_term=mp+meaning+uk
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8f7fc32416487af06c1e/1626115968042/33650259557.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60eca00a44349d7bb06f0287/1626120202459/major_theories_of_communication.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec86cafa40056e74d29aed/1626113739062/latest_names_for_boy_start_with_s.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8b914e5d4731e3e94da55/1625864468266/the_woman_and_the_roses.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_off0000de18.bin
fd95cf14a48b1e572dbf21f9d3cc159811ab7e93a3e1f2b2f1a366e8e4893a95		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE18 17200 bytes
font_01_sfnt_off00010b1a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1A 16792 bytes
font_02_sfnt_off00012331.bin
6b2ce96e1b2e4e4c6df42da36146d9d5a72b35a618e315307162e492e41b2c37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 10248 bytes

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