Malicious PDF — malware analysis report

Static analysis result for SHA-256 900fca280f31ae49…

MALICIOUS

PDF

30.2 KB Created: 2020-04-26 01:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ad20f037590d3516a047f662576fb9bb SHA-1: 88fd79b0459d129151ae65dbd8008d8908d04a46 SHA-256: 900fca280f31ae491b558f92f6544d6e55efe76baad33a4c1f923165ecb920d6
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The document contains a large number of embedded external links, many of which point to domains that appear to be part of a link farm. These links are likely designed to lure users to malicious websites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nclshop.us/uploads/1/3/1/4/131437780/131437780.html#beautiful+angel+images
    • http://robertssale.com/uploads/1/3/0/7/130739492/takuxonefujumu_xabujevoxif.pdf
    • http://cultureofwrestling.com/uploads/1/3/0/3/130323285/nokidexadek.pdf
    • http://cathyabraham.org/uploads/1/3/1/4/131483184/mirivuvavalexaw.pdf
    • http://vancouverholidayrental.com/uploads/1/3/1/4/131453615/tusex.pdf
    • http://elitecakesboutique.com/uploads/1/3/1/3/131384484/3033763.pdf
    • http://languageservices-tal.com/uploads/1/3/0/4/130477192/jovederazotokaxiwo.pdf
    • http://genealogylegends.com/uploads/1/3/1/4/131409200/2786b1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fe7.bin
2ab6a74efdefcb41b97aaa7499603ea7e0c18aa262af188484e34b995bcba44e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE7 7544 bytes

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