Malicious PDF — malware analysis report

Static analysis result for SHA-256 2354ae408b9219bd…

MALICIOUS

PDF

72.1 KB Created: 2021-07-14 07:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6cbc725b9ead2b36f34d26dde214fe4c SHA-1: daae9c1e129aee952fb41b7c85f83d397bd8afd3 SHA-256: 2354ae408b9219bd219273a1f2557f3e477f2b608effbe150ff4808683f2f247
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV with a specific signature indicating it is a phishing trojan. The PDF document contains multiple embedded URLs, some of which are associated with the phishing lure. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

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/sq/ugae/~3/iXsW93xxTQA/square?utm_term=peacock+family+chiropractic
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec791a947cc46ca1277cae/1626110234066/nasujux.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e95c0b3b7e7c633451f466/1625906187694/jaggery_for_health.pdf
    • https://medlineplus.gov/chiropractic.html
    • 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_off0000bd72.bin
981c01ed740054ffeb65055fc92f2acbae3d201487c1df62f2b0b57ee958abd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD72 10680 bytes
font_01_sfnt_off0000d5ee.bin
2f1819ed508852c434fa722dea1e1e5a3e0e25fa2a0692aa7e40a00446bd908d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EE 15216 bytes
font_02_sfnt_off0000fca4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA4 16792 bytes

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