Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b6462a9c5af48d…

MALICIOUS

PDF

38.0 KB Authoring application: Solid Converter PDF
MD5: e0612a97ed1f01d1cd3b23eb1dbe65a9 SHA-1: 28b0c10f86493f206cf9ba61120503674f1853ac SHA-256: 80b6462a9c5af48d464f150074fc9a8d20db3976b5337aa433b74bb56ee63422
152 Risk Score

Malware Insights

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

The PDF contains a link farm heuristic, indicating it's designed to redirect users to multiple external sites. One of these links, http://amadorrunning.com/uploads/1/3/0/5/130539170/016579ef.pdf, is flagged as malicious by ClamAV and ML classifiers. The document body mentions 'Masaaki imai biografia' and a warning about an outdated Internet Explorer version, suggesting a social engineering pretext to mask the malicious links. No scripts were extracted, but the PDF structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://amadorrunning.com/uploads/1/3/0/5/130551341/016579ef.pdf
    • https://bobalefulekas.weebly.com/uploads/1/3/0/5/130539170/xegufesubonogejiv.pdf
    • https://nunalaresuzew.weebly.com/uploads/1/3/0/2/130287504/rixow_tamunimijikuvaf_fefolaroditiwex.pdf
    • http://rochecenter.org/uploads/1/3/0/6/130603728/130603728.html#masaaki+imai+biografia

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001099.bin
2815c12a2f96167ab14872589814583998c317c21acc8febc4d5959f52bcaa73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099 9380 bytes

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