Malicious PDF — malware analysis report

Static analysis result for SHA-256 eebb54b33d758434…

MALICIOUS

PDF

73.2 KB Created: 2021-07-19 15:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09ca5c0c0f64a31fd8e48c17b8d0f4f4 SHA-1: ab084103f1dfa4fa427f5e57960d660d1af3e3f4 SHA-256: eebb54b33d758434b134f5fdd80706b076d4bca08ebeb1703ffcea0189bfe9d2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing trojan. It contains multiple embedded URLs, though most are confirmed benign. The presence of PDF-specific heuristics like PDF_URI suggests it attempts to redirect users to external resources. No scripts were extracted, but the overall structure and detection results point to a malicious intent, likely to lure users into a phishing scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6193

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/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=white+lion+and+white+tiger+cubs
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4d1338a396f1703afe153/1626657075899/all_checkmates_in_chess.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f09288e0d9f61c7ffb2f06/1626378888594/vesot.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1c8e0e65d556de6a9b0b4/1626458336947/16417964302.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede347e635d7166462389c/1626202951949/scantron_multiple_answers.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_off0000beef.bin
f411653cd8bcc840a23bb4e631144dc715cd7f9651d9013a3321bfbb144e5d4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEF 16044 bytes
font_01_sfnt_off0000e83c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 16792 bytes
font_02_sfnt_off00010053.bin
fa5866f6ef0e71c3e52c90cb06ffe8a3ea1650cdfb4a853973d7703c0517e693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10053 10968 bytes

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