Malicious PDF — malware analysis report

Static analysis result for SHA-256 f254ff18222b2a6e…

MALICIOUS

PDF

76.4 KB Created: 2021-07-15 20:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e13d5a5e7d1dbcb77504d186cf5d7729 SHA-1: 9a31714d0948607c85567370d5a44471f722d724 SHA-256: f254ff18222b2a6ee9551e4b5b10673a46b668eaa92adf07c9add82555c59e77
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV specifically identifying it as a phishing trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure users to external resources. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall indicators point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6911

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=god+is+able+to+make+it+up+to+me+by+israel+strong
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee8b01588fb5669518a2f8/1626245890031/84087630276.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f05314d3fa5e42b99d30a5/1626362645653/supervision_definition_english.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c777b7022a177a59c8f9/1625868151561/66950120376.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee1886588fb56695119310/1626216582479/100_chinese_yuan_to_sgd.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_off0000c4c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C7 16792 bytes
font_01_sfnt_off0000dcd9.bin
a8d36a74fb8520e65ace63d90671465f0340cdf71a144d2132937333241883c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD9 17100 bytes
font_02_sfnt_off000109c8.bin
005b9f5593cf7147e4178ecd45f6a093c49e21dd165652168dedf06ba9a6a2e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C8 11220 bytes

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