Malicious PDF — malware analysis report

Static analysis result for SHA-256 809fbe4b7cd82e7c…

MALICIOUS

PDF

79.0 KB Created: 2021-07-17 19:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 36243e7d031eed742d4af820f57da976 SHA-1: bcdc2a6886e9910f2bf406d550513516733a1bd3 SHA-256: 809fbe4b7cd82e7c68fc356f35d66edb277b99599ea1bbfec71c3f18de2131cd
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 for 'Pdf.Phishing.Trojan'. The presence of embedded URLs, though some are marked benign, suggests a potential phishing or credential harvesting attempt. The ML classifier also indicated a high probability of maliciousness. No scripts were extracted, but the overall pattern points to a phishing lure delivered as a PDF attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7113

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/~3/4aHNpQc2m6I/square?utm_term=how+to+plant+corn+seeds
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e76918fa3f1514f5c49d65/1625778456943/zafojumuxilupigojojawus.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f06767e9e0d35c3b8d55f0/1626367847130/jimapumi.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e79441ed7e6304395ff6bc/1625789505595/benigasasel.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee3d336bb0602df211809e/1626225971743/94011990498.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_off0000d3d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D3 16792 bytes
font_01_sfnt_off0000ebea.bin
26b3fab409462283c568c5cf1982b602134beacac2b3b84e63ffc200e8af6012		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 10492 bytes
font_02_sfnt_off000103f8.bin
551c3804a14705a572a952c61c7fa3677ff0f78537a458441a270fb52d7f2b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103F8 17072 bytes

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