Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c33263bbf9827f…

MALICIOUS

PDF

75.0 KB Created: 2021-07-15 22:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03feca453a20d6323b8764807d94bf05 SHA-1: 422ebab1e4c3202ccedc4351284fc5f349af0003 SHA-256: f0c33263bbf9827f4c74143e1e6eaeec5b95b1cdd1429c9ca25c077ef84cda5d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. The PDF contains an embedded URI that points to a URL, which is a common tactic for phishing attacks. While the document body is heavily obfuscated and unreadable, the presence of the ClamAV detection and the embedded URI strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/UkUWPC8UKDU/square?utm_term=view+layers+in+photoshop
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed281cdacdbe35d626cc45/1626155036573/81071904565.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_off0000c818.bin
d062f8ddf284873eda2261e00ccfd18577abfd0e35b6209437b229d329e0a6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC818 15692 bytes
font_01_sfnt_off0000f076.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 16792 bytes
font_02_sfnt_off0001088d.bin
8e2999b87dc507e85e8ab9ddeb57546232865f5ae9175934e370599ad7608629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1088D 10520 bytes

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