Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c85ea6ba5036ea…

MALICIOUS

PDF

81.1 KB Created: 2021-07-19 07:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8fb5be89c007dfc5dee924e3d21366e SHA-1: 1b1ea4ff0f5b90a07ed8f4e485f6d90d04b2c60d SHA-256: 40c85ea6ba5036ea74c073e8a1ef8265168ac307d847bda32d508ac7ab5401ac
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics point towards a malicious document designed to deceive the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/HbdJGeoIq_s/square?utm_term=defence+attorney+salary
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7c9c19a16f038d619b88/1626111132948/kilebexadoroxowogi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f48bdb22602c08cafce477/1626639323461/dristi_current_affairs_today.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f13394adf71e7547cd87fe/1626420117114/filhaal_song_whatsapp_status_download_mp4.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee82e14d490f672755fdc6/1626243809152/i_am_not_a_number.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1d84642a7f871221a9ac3/1626462278464/fugenirisel.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_off0000dd14.bin
022eb8363fcd54e759546ab74c3821117ee59936477560243ac46cbcdbb8700b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD14 10352 bytes
font_01_sfnt_off0000f4ae.bin
429947ed764ff75cf65fa9a2cd85de803842da2a0d9702e922689e459a51d67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 16856 bytes
font_02_sfnt_off00012088.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12088 16792 bytes

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