Malicious PDF — malware analysis report

Static analysis result for SHA-256 2783b21f53e2b8cb…

MALICIOUS

PDF

75.5 KB Created: 2021-07-18 18:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 653e71ca4f6c611856bb06591327cf0e SHA-1: 314a643afcf5c94235e9cfcb96989a68e9812c39 SHA-256: 2783b21f53e2b8cbe9d5c1001830af05e1cf81c4a16615bf9db3d8eab2f3358e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV detection and the presence of an embedded URL strongly suggest malicious intent, likely for phishing or malware delivery. The PDF document contains an external URI pointing to a suspicious URL, which is a common tactic for spearphishing attachments. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate an attempt to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/NsX9ihectO0/square?utm_term=13377x+to+movies+bollywood
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f412ed731d8c7c6f0436bf/1626608365759/51201873231.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e86e2bde876b5fc8bc2ed9/1625845291434/37350983355.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_off0000c6b4.bin
91b6aff6ce5fb5288e43496e8d71032fb6ff55179b71353f8fc1073795ffaa96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B4 16544 bytes
font_01_sfnt_off0000f1bd.bin
cf0bacb41ef68423beda960793e5d5107e11359298de0872107c7b38d98ee781		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BD 10728 bytes
font_02_sfnt_off00010a9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A9A 16792 bytes

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