Malicious PDF — malware analysis report

Static analysis result for SHA-256 96435c689ace31e3…

MALICIOUS

PDF

47.9 KB Created: 2020-04-17 01:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a9e3c4b5491e500b7ad9d3e7e6fbf914 SHA-1: b2838ab3e46c12a6450317813a2f8febe233cab7 SHA-256: 96435c689ace31e345c2413e7096fc808439a979210880ec99e5afa5258c75c5
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a likely attempt to drive traffic to a network of linked pages. The document body, though heavily obfuscated, contains text related to a 'Holographic codicil to formal will', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://capefearforge.com/uploads/1/3/1/1/131163854/131163854.html#holographic+codicil+to+formal+will
    • http://cmcindustries.net/uploads/1/3/0/9/130969862/43c56610b36fd.pdf
    • http://bradschuck.com/uploads/1/3/0/4/130478347/fb86f6026.pdf
    • http://ecoroot.net/uploads/1/3/0/7/130775854/7139619.pdf
    • http://dougsfloorcare.com/uploads/1/3/0/7/130739238/mafojuvu-mekemibamatoz-rarogipuz-datigu.pdf
    • http://carolegelkerartist.info/uploads/1/3/0/2/130289688/segipavef_joxojipokosu_nalev_fisaxam.pdf
    • http://odontologialashigueras.com/uploads/1/3/0/5/130543980/5491520.pdf
    • http://rancho-del-lago-homes.com/uploads/1/3/0/7/130775455/winanarifab.pdf
    • http://hoopsnakegraphics.com/uploads/1/3/0/2/130272850/9381627.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f92.bin
cd8ed88927d7ffe72f930fc4b4e198c3510df60a2d95bb90c6ed21f7fb644051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F92 8104 bytes
font_01_sfnt_off00009f00.bin
f335bbb8769c533cbca16f6384a9be7e2e65528b9693bf598f9b6a21ed261b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F00 16036 bytes

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