Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52f3dce623fc38a…

MALICIOUS

PDF

74.1 KB Created: 2021-07-13 21:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b118657312042fc47976947cb56c7856 SHA-1: cbcd04d8ac9a74781ed3ae1af3ae4c57862aa8e8 SHA-256: e52f3dce623fc38a4645e03e7f012ed287ac48e127c54701ce4428edcd1c5c71
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, although many are marked as benign, suggests a phishing attempt. The PDF structure and embedded objects are consistent with malicious document delivery. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

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/razvivatel/yapz/~3/um1bUVUAM38/square?utm_term=doll+outline+template
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb953a60fc80735a111c4/1626126676065/92568429090.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e81e457d3b385c94b82a7c/1625824838031/ethical_theory_and_business.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_off0000bbdf.bin
48092e6d3fc813899cf951004df772dd94eef2c18dcdad92dc14c106bba90a7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDF 19120 bytes
font_01_sfnt_off0000ec52.bin
990421d7484cff54c5a7d605f523bc94fa6a2c6dc1f5de05ef05420875965a9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC52 10244 bytes
font_02_sfnt_off00010343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 16792 bytes

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