Malicious PDF — malware analysis report

Static analysis result for SHA-256 639100196efe9941…

MALICIOUS

PDF

76.9 KB Created: 2021-07-16 11:59:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0888336c298a7e812305ef4812741ae6 SHA-1: 2a5e964ce1bc8c9c1820ae405157e1fbc1b70303 SHA-256: 639100196efe9941f2feb0e256c8446c098e854a8e1cdbc564cff25f02220b5b
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, despite some being marked as benign, suggests an attempt to redirect the user to external resources. The PDF structure and heuristics indicate it is likely a phishing or malware delivery document.

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/ZV5PD9BTPXI/square?utm_term=come+on+down+lord+jesus
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f056854381433ecec4af9a/1626363525404/vonafi.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6053c27d1e40a54c9477/1626234963364/nimafo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8c51cd7702a4b9a6f592a/1625867548135/jipuxunukupakomen.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f057739d64d77af31842ea/1626363763743/12946438933.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_off0000cbd3.bin
02d631508bf1bb97b5d35fdabc15048ba97cb87d50a226fa71a4e36cadad2f6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD3 10404 bytes
font_01_sfnt_off0000e36d.bin
72b8c9ff1edd15de5235f5ff62afe73d7bdca8cbeea9f60185a7aafd26eb8a1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE36D 17108 bytes
font_02_sfnt_off00011017.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11017 16792 bytes

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