Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccda4a20b5242fd6…

MALICIOUS

PDF

75.5 KB Created: 2021-07-18 05:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e8975ef7a299f8716be8b18c685a037c SHA-1: 2db837841acd2c5de55f0f19ee37dd6b267b60c9 SHA-256: ccda4a20b5242fd6ece85ed438075104e9e960a751a896b65880a28293cd79d5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or social engineering attempt. The embedded URLs, although many are marked as benign, suggest an attempt to redirect the user to malicious content or download further payloads. The PDF structure and heuristics point towards exploitation of vulnerabilities within the PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/eaN1Eb74jJI/square?utm_term=getting+baby+baptized
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7ce719ebc0053f315df7a/1625804402135/how_to_do_in_text_citation_in_powerpoint.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee6a90ab0cb8743be75ff7/1626237584652/towewezikonurox.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f369e28a396f1703a03d2f/1626565090710/73828082671.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_off0000c8ff.bin
2438989399615b4071e46a01e7bb3be6793403bf6355e4e285b27bb76c17a4b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FF 10488 bytes
font_01_sfnt_off0000e09c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE09C 16792 bytes
font_02_sfnt_off0000f8ae.bin
b965c46480d860c2a7ef7ea8ea342097aafa18ee5e411670556569024661f938		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AE 16344 bytes

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