Malicious PDF — malware analysis report

Static analysis result for SHA-256 24acc2fdd470e44b…

MALICIOUS

PDF

78.9 KB Created: 2021-07-17 16:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 062e5c3b8252e59d11d8e504ac2b03f7 SHA-1: 7886bc836e956db8d8b6060d78c89c06ebb78dc9 SHA-256: 24acc2fdd470e44b0baca96d7d32bab1098e85fee987525bfcf169a8a52bd321
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. The PDF contains an embedded URI that points to a Google feedproxy URL, which in turn likely redirects to a malicious site. While the document body is heavily obfuscated and unreadable, the presence of the URI and the heuristic firings suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8740

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/~3/7R6buoffwiA/square?utm_term=subsistence+farming+and+intensive+farming
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee32f7c27d1e40a5497bb1/1626223351255/photoshop_isolate_color.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee018e8f209f4d8287986a/1626210702283/11040235566.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec927e83836e7a7d6207a2/1626116734423/chingy_one_call_away_mp3_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edbcee11c4f2729d7ee119/1626193134855/dale_indiana_to_santa_claus_indiana.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f06c2b7865aa574580608f/1626369067839/zigujijamenumajeju.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e92744c0906550d90b64ab/1625892676360/narcissist_health_issues.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_off0000d333.bin
10d765089b2c1bf9e1b812c76547ff2e3afe63d6f9230c9596abfe69ef48b68d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 11036 bytes
font_01_sfnt_off0000ecb8.bin
fb588d3c09a2b7049cefc0e34278bdca80118e69e671ff9cfea249ee14a118b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 16464 bytes
font_02_sfnt_off0001179c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 16792 bytes

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