Malicious PDF — malware analysis report

Static analysis result for SHA-256 396af5b705159dce…

MALICIOUS

PDF

38.6 KB Created: 2020-04-14 02:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c482d020f0bfa312c9fe32f963a87d0a SHA-1: f055848ebd5a17bc3b739d75fa6c8460127c9322 SHA-256: 396af5b705159dcefeb6079bce3704e5d72834613b8e9e6026a9e4668ffc70b2
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 point to domains that appear to be part of a link farm designed to host malicious content. The document body, though heavily obfuscated, contains a URL that matches one of the extracted links, suggesting a deliberate attempt to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://gigoloasuloe.shop/uploads/1/3/0/4/130436439/130436439.html#football+game+free++for+laptop
    • http://albazi.net/uploads/1/3/0/7/130738814/lebokefedulega_kuletunutu.pdf
    • http://kabongs.org/uploads/1/3/0/6/130621450/katijemaz-movojopakaxite.pdf
    • http://elliehaworth.com/uploads/1/3/1/4/131454816/kikajowajabom.pdf
    • http://risingblades.com/uploads/1/3/0/5/130551839/e0a5cb.pdf
    • http://serenitymentalhealthservices.net/uploads/1/3/0/4/130476699/7724210.pdf
    • http://animalandiagta.com/uploads/1/3/0/9/130969709/wejasoguvodiz_dusudurasubep_duvelilinol.pdf
    • http://bioxtreme.net/uploads/1/3/1/3/131379552/dafapedunedezamem.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_off00006f4c.bin
94b7ebafdcba34091c8bf78e6a6b59861afd6e728f260d90ff48e3d3a1431e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 8192 bytes

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