Malicious PDF — malware analysis report

Static analysis result for SHA-256 c429daf6e605786f…

MALICIOUS

PDF

81.9 KB Created: 2021-07-13 21:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef04877961f3484ec8ee688d40753b5a SHA-1: f60ea4146d2a14d2e6a8ce1c39147874d1a94556 SHA-256: c429daf6e605786fce052c09ae586a98e0ab0af21348c8752d9571b1a9014e2d
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 embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and heuristics indicate it is likely a phishing lure, attempting to trick users into visiting a malicious site.

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/~3/0YvHz_IItD0/square?utm_term=the+lament+of+hermes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e89c503832431b44086bd4/1625857104219/ologist_medical_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec84738bb04542cee4a033/1626113139570/tight_sphincter_muscles_anxiety.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e94d97f492d21a0f6c3a57/1625902488195/intestate_succession_by_state.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec93d869d4b63361485891/1626117080974/baby_cooing_at_1_month.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93d278fb24157da710529/1625898279705/mixtures_and_solutions_quiz.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_off0000e229.bin
c3554e22a65d7b34898e567a4b2b7bf9f46972d904a75aa0fd6e0eaab91e6681		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 10352 bytes
font_01_sfnt_off0000f960.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF960 16792 bytes
font_02_sfnt_off00011172.bin
92ba228740ba03e246692671099bda0d27a668655d56a1287b64967822acbb04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 16688 bytes

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