Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3cc9def0c960c8…

MALICIOUS

PDF

79.2 KB Created: 2021-07-12 23:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3597718b87f29d28fb295190877df26 SHA-1: fb1348eca7c827618199cb52ab6bc1760cd41126 SHA-256: be3cc9def0c960c857b449ed3cbcc6dc2fc0cf8310e6368222da90b080ad2908
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The PDF structure and embedded objects are consistent with common techniques used to deliver malware or facilitate phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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=harry+potter+and+the+deathly+hallows+part+2+free
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec90587b14134336ddbd06/1626116184684/human_resource_information_system_mcq.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e84d16f518dd358f68a23d/1625836822839/flight_from_nyc_to_miami.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e885564a2d4256068be105/1625851222782/6674407846.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_off0000d3bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BC 16792 bytes
font_01_sfnt_off0000ebce.bin
d4f6ab5524769cb33ebb7a0234bcfc4a22b03876b12cadab1cd7136ee4a79d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCE 16908 bytes
font_02_sfnt_off000117bc.bin
56be15b390926f6161846b707adf90a882f99a2119775fc80e9c93080f5bb8e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117BC 10816 bytes

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