Malicious PDF — malware analysis report

Static analysis result for SHA-256 563a4ac7aeb9c21a…

MALICIOUS

PDF

38.5 KB Created: 2020-04-03 09:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b1ef2f81c2fdaa488ef5a99f0cffb4cd SHA-1: d1d6730140df8e1be49550098dc1becbd29f3cc4 SHA-256: 563a4ac7aeb9c21a801cb66e7b1aa1af12ec622dd74a53e3a852d4284ec2cbf3
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which appear to be part of a link farm designed to manipulate search engine results. The document body contains a seemingly innocuous title 'Jersey mike's lettuce wrap sub' which is likely a lure. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external 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://decomuraux.fr/uploads/1/3/0/5/130588216/130588216.html#jersey+mike%27s+lettuce+wrap+sub
    • http://qualityquantityservice.com/uploads/1/3/1/4/131453870/5256444.pdf
    • http://novahvacpro.com/uploads/1/3/0/3/130379353/nobugamaxinifusu.pdf
    • http://brighterimagemalta.com/uploads/1/3/1/3/131380208/meruzi-wesol-funoputapimopun.pdf
    • http://mijblaxby.com/uploads/1/3/0/2/130289235/1133831.pdf
    • http://heightsfloraldesigns.net/uploads/1/3/0/6/130621334/9299602.pdf
    • http://chordofappeals.com/uploads/1/3/0/3/130379326/15666d3b2.pdf
    • http://joliepepee.com/uploads/1/3/0/3/130379424/6d2ec86387c4b3.pdf
    • http://terispassion.com/uploads/1/3/0/4/130476499/nidalab.pdf
    • http://kristawoelk.com/uploads/1/3/0/6/130604568/vipedakafutukitifov.pdf
    • http://tamcoh.org/uploads/1/3/0/9/130969459/misumiped_gupevuv_gobikodokenum.pdf
    • http://kingscredit.org/uploads/1/3/0/6/130620511/7006608.pdf
    • http://glistenonline.com/uploads/1/3/1/4/131454984/6617652.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_off00006ab5.bin
947b4fc95db0379bdc828b5b79d727ea5f94f53860014dcf91cd6a44086752f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 8568 bytes

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