Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87f636423d1141b…

MALICIOUS

PDF

33.6 KB Authoring application: SWFTools
MD5: f2871e5ed5f010240d2d8e91b789bbd7 SHA-1: 3ca5393379f1fb428dbb0d1ea85c76d828aff032 SHA-256: d87f636423d1141b363e902a0bc54d2cfa50a79785312e6d1be628069a435e34
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. This is a common technique for distributing malware or phishing content. The ML classifier and ClamAV detection further support the malicious nature of the file. The embedded URLs are likely part of a link farm designed to distribute further malicious content.

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://whitparker.com/uploads/1/3/0/2/130271108/kiderigerorufe.pdf
    • http://dog-gonefancy.com/uploads/1/3/0/6/130621446/xaxodudufononi.pdf
    • https://mubobebebo.weebly.com/uploads/1/3/0/4/130436483/990671.pdf
    • http://sttheresefoundation.org/uploads/1/3/0/5/130588798/tamawusibutenerazubi.pdf
    • http://leeoptical-malden.net/uploads/1/3/0/6/130620795/vevumadama_ramaba_naluroribuselum.pdf
    • http://vusexesi.help-tao.com/uploads/2020/01/27/lekiguzel.pdf
    • https://sukovujimoki.weebly.com/uploads/1/3/0/3/130379298/dufivadoji.pdf
    • http://mariettasquarefarmersmarket.net/uploads/1/3/0/6/130620923/xibesoroboz.pdf
    • http://wuzolopabe.svyazexpo-online.ru/uploads/2020/01/28/tememebawapij.pdf
    • https://gokuzuxoni.weebly.com/uploads/1/3/0/6/130604632/2768058.pdf
    • http://lebanonvalleydc.com/uploads/1/3/0/6/130605426/130605426.html#sample+accomplishment+report+in+science+and+health

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001298.bin
3cfde4370a692fc02b127c9aee10851e761c0b0cf26ca970e721337296544a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1298 7664 bytes

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