Malicious PDF — malware analysis report

Static analysis result for SHA-256 39c59acb136178b1…

MALICIOUS

PDF

58.6 KB Created: 2020-04-19 00:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e47471ed76f31f534b3c3fe3e10fb16d SHA-1: 7224d314d90ee8c9d07cf5254f5eb596e323f7fd SHA-256: 39c59acb136178b150f577e9fe9b4598e36375fe8bb894ed5116673305716b3f
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded URLs pointing to potentially malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document's intent is to trick the user into downloading a password-protected archive, likely to bypass security measures. The ML classifier strongly flagged this PDF as malicious. The document body contains references to Anaconda and wkhtmltopdf, which may be part of a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9906

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://thesummervillegroup.biz/uploads/1/3/0/2/130271145/130271145.html#anaconda+4.+1.+1+python+3.+5
    • http://deswalker.com/uploads/1/3/0/4/130477890/kovitud-ralopodomixuna-savunadovukavox-rotizixemi.pdf
    • http://feelgoodcook.com/uploads/1/3/0/6/130620343/669aa66082.pdf
    • http://weedenterprises.org/uploads/1/3/0/9/130969386/6647807.pdf
    • http://traildes5calanques.com/uploads/1/3/0/5/130551488/6685507.pdf
    • http://lunamcruz.com/uploads/1/3/0/5/130550660/6861767.pdf
    • http://weedenterprises.org/uploads/1/3/0/9/130969386/6647807.pd
    • 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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c030.bin
3de39f1d9f5f9b28db7b68f0512f19c606667c9eff265a3cc79dd7892cf3a817		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC030 7952 bytes

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