Malicious PDF — malware analysis report

Static analysis result for SHA-256 222797280af66e36…

MALICIOUS

PDF

84.5 KB Created: 2021-07-13 14:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 771b36c5e5ad6022789a9515dd450156 SHA-1: 2e068b56e2f58cfc5f7b31a8f22df2dde662324c SHA-256: 222797280af66e361817226e93e33ae4c91b25a7f1373d7b831c6a889e3ec61c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as malicious and a machine learning classifier. It contains an embedded URL that, while currently marked as benign, is suspicious given the overall verdict. The PDF structure and embedded artifacts suggest an attempt to disguise malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9550

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/eoPDrVzwpx0/square?utm_term=body+donation+after+death
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7975c8b0d544b6d69e00/1626110325620/class_12_time_table_2021.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed28c86b40a9602c940207/1626155209082/24719658437.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e895fb838ace6d86d3ec23/1625855483923/31678265170.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8cc144349d7bb06cef44/1626115265528/arithmetic_sequence_model_questions.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec785fa1f8f93f64aa9f76/1626110047429/95963850553.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e77b651bd7543d7b5c5e02/1625783141185/gejawodomosali.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed4b2cf9a98d6db3abd43b/1626164012790/df_sort_by_column_value.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92d7fb132fa362073eaed/1625894271834/valency_of_elements_with_symbols.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_off0000eaae.bin
8f6463770df404dd70c8775100df5cc733f49a8ac6121876e80e383fa93f88a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 16772 bytes
font_01_sfnt_off00011674.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11674 16792 bytes
font_02_sfnt_off00012e8b.bin
612b4b61cd20615ef2d92fefa7c4be924847cb9e7c213306e20126cef3d54673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8B 10404 bytes

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