Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97805e2fa55dcaa…

MALICIOUS

PDF

77.0 KB Created: 2021-07-18 19:01:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f07498180060b80c407374457bb1af36 SHA-1: 335785f56a3a794bb1d469f2fd61d8e8f271da45 SHA-256: d97805e2fa55dcaa084c4c39e873af012f0e90d8c6a921aa8c7870d3b5f89068
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to direct the user to external resources. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/~3/4P1vZUbBa90/square?utm_term=bonnie+and+delaney+never+ending+love
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec913c44349d7bb06d6a2a/1626116412370/bathymetric_and_hydrographic_survey_services.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee70373753dc428c8b45c3/1626239032060/french_names_that_start_with_n.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f30286a9adb72803a2bae7/1626538630865/44276987089.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f3ec1eb386920ff6d267b4/1626598430609/and_its_getting_better_all_the_time.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_off0000cbc5.bin
4d699fa45966b5ca7fdde88aec17a1dc1ab6705adb14732429097a9d5bc1befb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 10392 bytes
font_01_sfnt_off0000e32c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE32C 16792 bytes
font_02_sfnt_off0000fb3e.bin
961c4168dac62d6e244d8036cec76378dc7658392be69a4b9596190cef2b5376		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 17104 bytes

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