Malicious PDF — malware analysis report

Static analysis result for SHA-256 c25eaf429089d39d…

MALICIOUS

PDF

40.5 KB Created: 2020-03-31 03:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b0e542bca83c7a51fd3a22833e32440a SHA-1: 11bded2cafbc2ab57163fb9b92bf19c03cf43633 SHA-256: c25eaf429089d39da2206b8aff8658f0a1d999071c0a3935ce2cdf12874c02be
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious content. The ML classifier also strongly indicated maliciousness. The document body contains garbled text and what appears to be metadata, but the primary malicious activity is driven by the embedded URLs.

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://ereksitahanlama.com/uploads/1/3/1/4/131438330/131438330.html#non+intractable+nausea+and+vomiting+icd+10
    • http://unlimitedinstall.com/uploads/1/3/0/5/130543063/4495a7b02.pdf
    • http://michalrutkowski.us/uploads/1/3/0/5/130542717/91ae163374c03b.pdf
    • http://inc-quesquenrizet.net/uploads/1/3/0/7/130775441/b2eed58cba288.pdf
    • http://thetradersgroup.org/uploads/1/3/0/6/130604229/0bf93728186fc6.pdf
    • http://bearessence.net/uploads/1/3/0/5/130546343/63693bd11b1081.pdf
    • http://leahhartner.com/uploads/1/3/0/7/130776111/jowadoxe_wuroxu.pdf
    • http://otairving.com/uploads/1/3/1/1/131164152/5626424.pdf
    • http://itsnhicagirl.ca/uploads/1/3/0/6/130620480/fajoved.pdf
    • http://coalesceeventsmn.com/uploads/1/3/0/8/130874261/991857.pdf
    • http://lowcostphotobooths.co.uk/uploads/1/3/0/9/130969346/kezusuxolopetidiji.pdf
    • http://enthusiasmdiaries.com/uploads/1/3/0/6/130639506/8d38bda0c5954e.pdf
    • http://eclectic-elegance.com/uploads/1/3/0/7/130739369/kudedare.pdf
    • http://prettydelicate.com/uploads/1/3/0/6/130621444/wajigojototo.pdf
    • http://henhaul.com/uploads/1/3/1/1/131163507/22c91e7c2.pdf
    • http://wickedladiesbees.com/uploads/1/3/0/5/130588349/5383575.pdf
    • http://wjsphotography.net/uploads/1/3/0/8/130874050/4189173.pdf
    • http://vaionenergy.ca/uploads/1/3/0/6/130604295/785b35.pdf
    • http://preview2.digilocal.be/uploads/1/3/0/7/130775071/37169c3f54.pdf
    • http://vrdssafety.com/uploads/1/3/1/0/131071262/1874435.pdf
    • http://enads.org/uploads/1/3/0/8/130873951/povizig.pdf
    • http://viaed.com/uploads/1/3/0/6/130622002/pulanaw.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_off0000758e.bin
044a39d66740ec645e0e190440aa125dbbd9d6204a2e1880b560e072acfdd710		 pdf-font-stream PDF embedded font (sfnt) at offset 0x758E 7848 bytes

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