Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38df4335b85d55c…

MALICIOUS

PDF

75.8 KB Created: 2021-07-17 08:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb40ad6258b4b3140221aba9f14be5ce SHA-1: e4bbf5d6d0fa7b8c2d2a45d1ad8707df97f86bde SHA-256: d38df4335b85d55c7ef042c507b65f2dc09c05ecfcfa99f55a02d89e85e50955
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to a Google Feedproxy URL, which in turn links to a Squarespace PDF, suggests a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely used as a lure in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/qQn0o4eTdIQ/square?utm_term=dispersal+of+funds
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f1029c2c92ee1ddddc4860/1626407580709/agnes_obel_down_by_the_river.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ee6c309bd63f3d83b392/1625878124361/veviboridutorunaripi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60efdef179f953043cbd2143/1626332913541/handbook_of_cultural_geography.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_off0000c7b5.bin
304e4bc46255725775417b8c5c2d191661c2353a7497eee3952f6ac60ae147ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B5 16876 bytes
font_01_sfnt_off0000f3d2.bin
aa6e0bd3ea57816a5e354c556c8a6369b91d45bbc14a2f60139f02e3b3a7ca41		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D2 10492 bytes
font_02_sfnt_off00010bbe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBE 16792 bytes

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