Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f240f473927c64…

MALICIOUS

PDF

85.7 KB Created: 2021-07-13 16:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 46512941818481abd1964a45512aba1a SHA-1: f7dcf1d853cde2607e26f3641295249837f88108 SHA-256: b5f240f473927c64678139e41692367a9046c1c693e8b24a60784e48b97bf113
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 an embedded URI suggests an attempt to redirect the user to a potentially harmful website. While the document body is heavily obfuscated, the overall heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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/-7-cX3opz_8/square?utm_term=complexometric+titration+introduction
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed694ce255175820c09b98/1626171725302/craftsman_second_story_addition.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9529bb68d8f0f4bf9d112/1625903772098/tisesusuduberu.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91d97c22c005c9338859f/1625890199727/43820397777.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed433a8c96c6301f92920f/1626161978686/oil_southern_accent.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed630b02ab3a569c438fbe/1626170123820/kagiwotobafejavagusuro.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_off0000eba8.bin
435349ff1caa22e2fecc60ab82b33bdc462baa813f9aaeeb7844f3125b41c6fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 17032 bytes
font_01_sfnt_off00011879.bin
84df275c9ed57ddea6abeae47561112e63310f69d696f47f982cbcd858ddcdfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11879 10740 bytes
font_02_sfnt_off0001311a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1311A 16792 bytes

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