Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6c428ad2b2b271…

MALICIOUS

PDF

74.7 KB Created: 2021-07-18 03:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9c628aa3aa40b88d27569106d59249fa SHA-1: 18d2db1e680db2a2d885a239499e87a96769490a SHA-256: 7c6c428ad2b2b271cff527fa23f2333bdb384f21c54b1bb6361fda24ea4baf24
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9186

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/UkUWPC8UKDU/square?utm_term=can+countable+or+uncountable
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc4dda9d1f62037e0157c/1626195165193/bitavivuvomerabalew.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0a1806e1f7e2d59ecdd51/1626382721124/wopawitisoku.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edc197d9d5ad70ebcf3a9a/1626194327620/66240677492.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda21e03cb9e0b59796067/1626186270529/81889495910.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e941f9e6bd1231e608f751/1625899513224/dance_classes_for_adults.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_off0000c587.bin
08c1454a905cb04a87f05824893eea717d69e1e7d6944b75bfa5b0b950e3ef35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC587 16312 bytes
font_01_sfnt_off0000efe0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE0 16792 bytes
font_02_sfnt_off000107f7.bin
e17d8779d928b6b399bfe2a8bbf89e9339e5f35e9657664be8085e8842376b53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 10232 bytes

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