Malicious PDF — malware analysis report

Static analysis result for SHA-256 f18080e7859254f3…

MALICIOUS

PDF

40.3 KB Authoring application: Solid Converter PDF
MD5: 2aaab78a507784e82503b6d4e764c6e8 SHA-1: 87a46afdc399560f1f6dda51b290aac8962bacb9 SHA-256: f18080e7859254f3dd866d9b8d2ec3381f3a766fac1e6a8fc9ec5fcf529fe11a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though corrupted, contains references to 'Levis t shirt size guide uk' and includes URLs that appear to be part of a link farm, suggesting a lure to a malicious website.

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://millioninvestor.pw/uploads/2020/01/28/lepotumoja-suxukapi.pdf
    • http://foodallergyepidemic.org/uploads/1/3/0/2/130287285/b03647672ed1.pdf
    • http://brujaheights.com/uploads/1/3/0/5/130540284/8450689.pdf
    • http://klarathecow.com/uploads/1/3/0/5/130589415/595896.pdf
    • http://criostri.weebly.com/uploads/1/3/0/5/130589187/bfa1aa.pdf
    • http://mydealsoffers.weebly.com/uploads/1/3/0/5/130543133/ragafuxenapawita.pdf
    • http://nationalriskmanagementgroup.com/uploads/1/3/0/6/130621077/130621077.html#levis+t+shirt+size+guide+uk

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001180.bin
344924cd0d5a7eacb2e6524af2fbcf71b343275ea66d76911ba6820364e932aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1180 10588 bytes
font_01_sfnt_off00005613.bin
45c02b2af6541e968a29cce5065daad11ceb89767f7e442eecf81181f98fbc33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5613 16520 bytes

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