Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa7601c594ef698…

MALICIOUS

PDF

39.0 KB Authoring application: PDF Studio
MD5: fa906fb05761a7c85e849f63220bc733 SHA-1: c7b1c9e75a518a922ed52a2a4bf7212ca72e46eb SHA-256: daa7601c594ef6988568c59f315ea03334717b75ae4f310ec9f568b283d91c62
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The PDF_SEO_LINK_FARM heuristic specifically identified a large number of external PDF links, with the first being http://coloradocriminallawattorneys.com/uploads/1/3/0/4/130435884/7054111.pdf. The document body contains garbled text but includes references to football and the URLs, suggesting a lure to external content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://coloradocriminallawattorneys.com/uploads/1/3/0/4/130435884/7054111.pdf
    • http://schoolmenuboards.com/uploads/1/3/0/2/130289229/wakapavudalonotubu.pdf
    • http://mysebgroup.com/uploads/1/3/0/6/130621201/61f095e1ba35.pdf
    • http://montebellonotarypublic.com/uploads/1/3/0/7/130739377/2792148.pdf
    • http://laceramica.studio/uploads/1/3/0/7/130739994/3232918.pdf
    • http://seweduba.feismen.tech/uploads/2020/01/29/segifip.pdf
    • http://sbfbla.org/uploads/1/3/0/6/130604874/130604874.html#everton+match+report+bbc

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001093.bin
89b49706f2409dd41e87054e14db8e08a8900692c8126eb1a5bb749a51e9b783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093 8024 bytes

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