Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c97f7f117c3e01e…

MALICIOUS

PDF

38.2 KB Created: 2020-04-06 15:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ea25d3a3e2569e83aeebb52fbac6938 SHA-1: c89ce614bfa62d4d9b4cbb96ef475616d6fbd9bb SHA-256: 9c97f7f117c3e01ec0adad2fc1964f4bcd9f177d81be91ab613b3784877b0b55
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm designed to distribute malicious content or conduct phishing. The ML classifier strongly indicated maliciousness. The presence of numerous external links points to a delivery mechanism that relies on user interaction to navigate to potentially harmful sites.

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.
  • 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://kardio-privat.com/uploads/1/3/0/6/130620431/130620431.html#who+am+i+song+reflection+paper
    • http://stratelega.com/uploads/1/3/0/4/130489361/bomajixunopo.pdf
    • http://jerrylinovo.com/uploads/1/3/1/4/131452836/dogavogefanajas_buteponujovabur_mubetepu.pdf
    • http://amvc.co.uk/uploads/1/3/0/7/130738884/wafabe.pdf
    • http://clcdenver.com/uploads/1/3/0/6/130639776/5495584.pdf
    • http://ohfivedigital.com/uploads/1/3/0/9/130969144/fejewarewu.pdf
    • http://rohsalgebra.com/uploads/1/3/0/6/130603918/7583590.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_off00006de4.bin
7d7c4796d1d5d100b8f1aff04904c9d76508f2045ebdec1181a639e736f0573c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 7924 bytes

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