Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b76a9a332d5670f…

MALICIOUS

PDF

35.9 KB Authoring application: PDFBox
MD5: 29135d2a29e737daf274c3815aff28fd SHA-1: 0c0e539d3b0efe94898d98262c7af461e72d55c9 SHA-256: 0b76a9a332d5670fd7c6059422dfe41c4e4e5a090fa2f30118539ea1d1ac691c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. The document contains numerous embedded URLs pointing to external PDF files hosted on various domains. The primary function appears to be directing users to these external resources, which could be used for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://noselodeacualquiera.com/uploads/1/3/0/7/130739996/7603056f2a49a.pdf
    • http://cup054.com/uploads/1/3/0/7/130776273/4362785.pdf
    • http://deceptivapparel.com/uploads/1/3/0/4/130477468/7256490.pdf
    • http://mta-sts.mail.westsidecomms.com/uploads/1/3/0/6/130604984/xezugululoku.pdf
    • http://www.highlandsbible.org/uploads/1/3/0/6/130620579/a2a29.pdf
    • http://beautyefx.com/uploads/1/3/0/3/130379488/7978578.pdf
    • http://teresa-davies.co.uk/uploads/1/3/0/5/130550809/nabaxagigejak-dusav.pdf
    • http://latercomics.com/uploads/1/3/0/3/130323236/tugure_luwofemeleto.pdf
    • http://aprendeinlgesrapido.com/uploads/1/3/0/4/130483285/reneluvubikuriteto.pdf
    • http://mytrucutz.com/uploads/1/3/0/4/130483122/6685041.pdf
    • http://overcomeporn.org/uploads/1/3/0/4/130488662/1739090.pdf
    • http://forthejoyofit.org/uploads/1/3/0/9/130969449/130969449.html#quest%C3%B5es+de+complemento+nominal+e+adjunto+adnominal

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003346.bin
35f0dee2e7a61a455d2661ae526ca737d0927e6dbe5c8b117af7289c3edcccae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3346 10088 bytes

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