Malicious PDF — malware analysis report

Static analysis result for SHA-256 230c6a234c2d25a3…

MALICIOUS

PDF

81.3 KB Created: 2021-07-16 16:42:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3f0c5b8a034f8d4b05eb0b1bafed0ef0 SHA-1: c94ac1965c0034056f91a5c192f0ce3a8c777969 SHA-256: 230c6a234c2d25a3674c8e0cebfc82a52f882f9bd288dab6cfad9d24001a1795
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 phishing attempt. The embedded URLs, although many are marked as benign, suggest the document's purpose is to redirect users to external sites. The PDF structure itself contains suspicious elements, and the presence of embedded URLs points towards a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/um1bUVUAM38/square?utm_term=wow+best+frost+mage+talents
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e944a858c6623f038374e2/1625900200168/how_to_astral_project_guide.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0bf2b1f8b9564881f87f/1626213362705/givigonetufudoz.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee7504462f394a1e458127/1626240260500/88257460293.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee6a0d7426fb5109f76e10/1626237453496/kunopuxixidiroxu.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
ba525d68e71ca6763e51b579e442423a1088f79539489714a6ab23cb12213e6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7B 10684 bytes
font_01_sfnt_off0000f619.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 16792 bytes
font_02_sfnt_off00010e2b.bin
0450225e9f1bbc3e18ba073ada88bb495fefda4c2212a16000c4580ba1057833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2B 16704 bytes

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