Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d809bfe562c34a9…

MALICIOUS

PDF

73.6 KB Created: 2021-07-20 00:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ecbc7640967ca1323b0f99ddf6d7347 SHA-1: 79d232f96cee589edbcb834293e85c3ceef11621 SHA-256: 5d809bfe562c34a9a987b2c562857ffc10272770dbad6aa7f19d54057fe47b2f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, though some are marked benign, suggests an attempt to lure users to external resources. The file's structure and detection by ClamAV as 'Pdf.Phishing.Trojan' point towards a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/pL_UGxDroB4/square?utm_term=angry+birds+games+unblocked
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f12a1e4be5f74a98e0c081/1626417694957/the_t_junction.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8e126f229ba2ea833d572/1625874727112/what_are_the_data_processing_cycle.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0093c177a4e2836d3c5ac/1626343741048/a_misspelled_tale_questions_and_answers.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_off0000bffa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFA 16792 bytes
font_01_sfnt_off0000d80c.bin
6da4db8676561d90c1620cdb305086a816debf38bdd4fc0b3455dfcec76c15c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD80C 16296 bytes
font_02_sfnt_off00010284.bin
2099673afa50ef0d3ed55a5bf7e5b9370fdfe12504c2130596c8db18ef835c52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10284 11040 bytes

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