Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8029cc0f1f2899…

MALICIOUS

PDF

35.9 KB Authoring application: LibreOffice Draw
MD5: cfc217841e338fea716803378b019b03 SHA-1: bca20415754cb7d0a4c430c6f79acdcd3683241c SHA-256: 3f8029cc0f1f28999365162029a9c07833b12b31e920cfad176d084d78cb521a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this file as malicious, specifically as a phishing-related threat. The embedded URLs are the primary IOCs, suggesting a campaign to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://gotmonks.com/uploads/1/3/0/7/130775772/7016dc.pdf
    • http://kidscreativestudio.com/uploads/1/3/0/3/130323424/wewuwufa-saxesoturix.pdf
    • http://mikecoupe.weebly.com/uploads/1/3/0/5/130551794/redejozifusux-dovizozen-jukazikizuxur.pdf
    • http://syedholdingsllc.com/uploads/1/3/0/6/130620751/xasurozizi.pdf
    • http://reboundat.com/uploads/1/3/0/5/130589412/130589412.html#first+angle+and+third+angle+drawings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001051.bin
06e50335276989d6da1a072a019953b2946bff1083c6602719e69b86e982cf41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1051 8216 bytes

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