Malicious PDF — malware analysis report

Static analysis result for SHA-256 e554b8c60c75a456…

MALICIOUS

PDF

81.9 KB Created: 2021-07-13 20:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a1f83b5038cabc9f0080eaad6288b9c SHA-1: 90a13aa91d1360a9d0520f4731ee6eb107102239 SHA-256: e554b8c60c75a45606e7bd8f6a4d8fcfcd40e7e673c69abedc54d756cd0aa7cc
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded URLs that likely serve as lures or redirects to further malicious content. The file's structure and detection suggest it is part of a phishing campaign aimed at delivering additional malware.

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/CcIy6vlvkUk/square?utm_term=dog+cries+in+crate+for+hours
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edb5f850566b3f86684439/1626191352404/74569908810.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb2a95dd1eb1c2908b136/1626190505169/tiwisovijurutekisalazabi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e77316203aa41bb6cd424b/1625781014902/1_second_timer_terraria.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e955eecc7c086459285537/1625904622828/24770587974.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84d481bca2d4c690ed7b1/1625836873077/dolidedonadezajuxekizifut.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_off0000dd7b.bin
57efd5e2e459cbdb991168c4f8aae2738d5cca69fd9e082d521e1a6ce2faadec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 17512 bytes
font_01_sfnt_off00010b9d.bin
1b425d953e1602f46c6b61d73510b1f1f41b46447d78e980741f3defd5d4032c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 10672 bytes
font_02_sfnt_off00012409.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12409 16792 bytes

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