Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b06a278e0a1364…

MALICIOUS

PDF

34.1 KB Created: 2020-03-20 04:18:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a3b8a46a69c125be71677f1f1efd106a SHA-1: 369f087ffc6707f1c6847281ada3d0f6d6fc47f1 SHA-256: 90b06a278e0a13641fb4418a39250a9fbd31c58965039dd10a43d37afb9f649b
92 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, a technique often used for SEO spam and to direct users to malicious sites. The document body itself is minimal, containing a title about typing special characters, which serves as a lure. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm.

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.
  • 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://taoswellwoman.com/uploads/1/3/0/6/130620321/130620321.html#como+hacer+el+signo+mayor+o+menor+en+el+teclado
    • http://piercedefensesolutions.com/uploads/1/3/0/6/130620966/bexofotodisumeb-gozizifavasap.pdf
    • http://stormikc.net/uploads/1/3/0/6/130620564/tiravokofawizip.pdf
    • http://aprili.shop/uploads/1/3/0/8/130814591/6340896.pdf
    • http://newholland4wdtractor.com/uploads/1/3/0/4/130435511/c92c4c6248.pdf
    • http://www.adventurefamilytravels.com/uploads/1/3/0/5/130545360/niwitaburada.pdf
    • http://mountainandwaterstudio.com/uploads/1/3/0/6/130621656/tezukowij.pdf
    • http://taurum.ch/uploads/1/3/0/6/130620343/28427.pdf
    • http://nextripchile.com/uploads/1/3/0/2/130291441/995231.pdf
    • http://www.chicagolandlaxclinic.com/uploads/1/3/1/0/131070401/pajobaxurefagemi.pdf
    • http://v-aria.com/uploads/1/3/0/4/130483682/3b582250a.pdf
    • http://margeauxsplace.net/uploads/1/3/0/4/130476066/2751231.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_off00005c67.bin
7785a3120d3ebdd7ac15d21b6e8efb644ecd2cfa88c0c94c2473ddc85452977a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C67 8484 bytes

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