Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ca486caa253ae5…

MALICIOUS

PDF

74.5 KB Created: 2021-07-15 10:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0154e196010698ca6dcec405d4616fe SHA-1: 1ea277ea31577d34db7f81ffa8ee95f0b59c7649 SHA-256: d5ca486caa253ae56b8355521890bb2be3cb8b476b0475ff1328fac7cbc89d80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious. It contains embedded URLs and obfuscated content, suggesting it is designed to deceive users. The presence of PDF_URI and EMBEDDED_URL heuristics indicates it likely attempts to redirect users to malicious sites or download further malware, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/ZFaGRQ6RLlg/square?utm_term=average+cost+inventory+costing+method
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e87b437a53a23ddeb23e86/1625848643635/25450083653.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efdf83fdf1560143492291/1626333059960/resonate_with_you.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecc2a949c8ff667814dc8f/1626129066110/duck_life_4_release_date.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec904258d864752e020eee/1626116162158/executor_and_trustee_of_will.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8d95f918372873877bab/1626115477684/89193564131.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_off0000c3f4.bin
82dc42cf6f9568bd6c574a7f532702d7041b0413e71112ba1cf25afbda781137		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F4 16008 bytes
font_01_sfnt_off0000ed34.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 16792 bytes
font_02_sfnt_off0001054b.bin
ec991c5aa9f8fcaeb6c9fdc81b57123ff198900ad45dc54c3e6319f833bba655		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 10932 bytes

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