Malicious PDF — malware analysis report

Static analysis result for SHA-256 e67f92f239e8e659…

MALICIOUS

PDF

33.2 KB Authoring application: pdf-parser
MD5: ac57254793fa64affa839ef47e7f4269 SHA-1: 8cd3cba839b66d05ee1d27f91bb17a445d597cf2 SHA-256: e67f92f239e8e659d272d4804f654c40a8ceb15f38bc84afb3f5882203b4c441
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this as malicious, specifically as phishing or traffic redirection. The embedded URLs are likely used to redirect users to malicious sites or to manipulate search engine results.

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://burscoughpc.co.uk/uploads/1/3/0/6/130621740/20b96a958bf5802.pdf
    • http://colorfulmindsaustin.net/uploads/1/3/0/5/130540401/ruvefejilevojati.pdf
    • http://www.magictel.net/uploads/1/3/0/9/130969976/gumizufadesejuvano.pdf
    • http://parasport-news.com/uploads/1/3/0/4/130476204/bc5fb2.pdf
    • http://flagcheckered.com/uploads/1/3/0/8/130813496/95353c6462ee.pdf
    • http://www.pdrobny.com/uploads/1/3/0/5/130542860/mexavibiwuni.pdf
    • http://www.30monumentsq.com/uploads/1/3/0/4/130489742/8783521.pdf
    • http://www.azsunriserentals.com/uploads/1/3/0/8/130814728/dotasajaberep_lekoji_levuvufamifewe.pdf
    • http://mylastduchess.net/uploads/1/3/0/4/130488157/a6eb5251da0ed1.pdf
    • http://www.burchflavorandaroma.com/uploads/1/3/0/5/130545954/somizawem_juleweputajip_dijodep.pdf
    • http://ncols.nhcapcadets.org/uploads/1/3/0/7/130739224/fuxamadifojitejeg.pdf
    • http://levelofourtimes.com/uploads/1/3/0/4/130475932/lotonujukokeji.pdf
    • http://vb2x0.slpny.com/uploads/1/3/0/6/130639226/130639226.html#abstract+algebra+a+first+course+2nd+edition+pdf
    • http://vb2x0.slpny.com/uploads/1/3/0/6/130639226/130639226.html#abstract+algebra+

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000298e.bin
590bc343df25579c6b683caa728bc586550e6dfb09d9871f45db4c63925f423b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x298E 7828 bytes

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