Malicious PDF — malware analysis report

Static analysis result for SHA-256 de96254a9f06947a…

MALICIOUS

PDF

70.4 KB Created: 2021-07-12 22:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ecbe87612a174b38f05e1f37ecf6b89 SHA-1: 8415a911ba7cab485e1d89969de72c6e46dcdf7d SHA-256: de96254a9f06947a3a8aa77793db4d2fac9d799e05a23b713a40666d63beb3c6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect the user to malicious content. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier clean score 0.1902

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/~3/0YvHz_IItD0/square?utm_term=positive+words+that+starts+with+t
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e916be18245d33f181594c/1625888446270/51520169946.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_off0000b82f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB82F 16792 bytes
font_01_sfnt_off0000d041.bin
f0e49831aa7f140f54d4499c531d67255ff8905a946d02500b12d612a68d2baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD041 15168 bytes
font_02_sfnt_off0000f6a0.bin
0a21d702bc658e27c2fef376a13c572f67925d7844f7676bc9d269bf01061a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 10348 bytes

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