Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb5b43fc6e6fde5…

MALICIOUS

PDF

51.6 KB Authoring application: PDFBox
MD5: a45502808a5fb0b840754d738934fe95 SHA-1: 7e05e032972b4d2c90d1d67060e2c5f2b4662da6 SHA-256: 7fb5b43fc6e6fde585690b07d365d95496b567f87eb6601026f480c3f5f9075d
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a common technique for SEO poisoning or phishing. The ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The embedded URLs are likely part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://prosperingmarketing.com/uploads/1/3/0/8/130814065/jeravegadevateb.pdf
    • http://alphaconstructiondevelopment.com/uploads/1/3/0/8/130815277/c7d2980f8.pdf
    • http://perceptualteaching.org/uploads/1/3/0/7/130739190/8239673.pdf
    • http://feedtheknead.com/uploads/1/3/0/6/130604770/2402639.pdf
    • http://mynuagain.com/uploads/1/3/0/4/130476885/benezogikibepepumef.pdf
    • http://dwmfoundation.org/uploads/1/3/0/2/130272577/ximasebej-damexepif.pdf
    • http://naimahusseini.de/uploads/1/3/0/5/130539305/tokoros.pdf
    • http://microml.com/uploads/1/3/0/5/130588745/suwobavuzu_susak_fesobavejagekag.pdf
    • http://scribejar.com/uploads/1/3/0/7/130775784/bejivizosebuso_bazugawasenika_pinagufazosego_mebumixeta.pdf
    • http://nicksandmay.com/uploads/1/3/0/2/130272856/webodud.pdf
    • http://localseonyc.net/uploads/1/3/0/5/130551623/gizebi.pdf
    • http://misssoutheastpageantry.us/uploads/1/3/0/4/130475938/130475938.html#causes+of+tooth+pulp+infection

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064d8.bin
16a5e95e952d18108d1293d23ab2cf42fd017bf7af5f1097447eb848de009448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D8 3116 bytes
font_01_sfnt_off0000727c.bin
d47748b5375a57c350c23eb8700bc855f53f7bde5116163e05a7067bd9872b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 8812 bytes

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