Malicious PDF — malware analysis report

Static analysis result for SHA-256 56fab090ebab2831…

MALICIOUS

PDF

31.5 KB Authoring application: Nitro PDF
MD5: a90b695eaa01ffece29eeb9c40e53fb5 SHA-1: 210c92fda5076a62727ff4887ea8fafbbd481ee9 SHA-256: 56fab090ebab2831bcfc0d441780ca491d3f9be310fa4a644b0e054cff319974
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to other PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though partially corrupted, mentions 'Genetics objective questions pdf', serving as a lure.

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://ponoshellcreationshi.com/uploads/1/3/0/4/130483469/1b36601.pdf
    • http://alloexo.studio/uploads/1/3/0/7/130738497/zozubokebig.pdf
    • http://theblockhousecafe.com/uploads/1/3/0/2/130291589/tekabiw-gebatewigewopo-jexerarisux.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/7/130740363/130740363.html#genetics+objective+questions+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fd1.bin
d7072c6399ea81f04f997939b4840d1cd6a1de85b860b1614ffb7cf370e6feaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1 8228 bytes

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