Malicious PDF — malware analysis report

Static analysis result for SHA-256 2830fc07c6ae95ed…

MALICIOUS

PDF

38.2 KB Created: 2020-04-07 04:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 059f4bf0eb32c3d70e4b186a69b768ef SHA-1: 49da46b40d5b9b77642d60bc99edfcdf37071b8a SHA-256: 2830fc07c6ae95ed8bc70a14d3e7231c616693d40fafc2e72dd6ef2def6ccb4a
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body contains a title that appears to be a lure, '10 adjetivos de 2 o mas silabas en ingles', and the embedded URLs are likely intended to redirect users to malicious or spam content. The ML classifier also strongly indicated maliciousness.

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://kylaconner.com/uploads/1/3/0/3/130323319/130323319.html#10+adjetivos+de+2+o+mas+silabas+en+ingles
    • http://scagturftiger.com/uploads/1/3/1/4/131407535/zivokoxavixirala.pdf
    • http://fitgirlsonly.com/uploads/1/3/0/6/130621832/sexilexivazamaze.pdf
    • http://cleaningcreations.net/uploads/1/3/0/7/130776872/kagujubofejepawini.pdf
    • http://runnersofthenish.com/uploads/1/3/1/1/131164260/2605800.pdf
    • http://langfordglass.com/uploads/1/3/1/3/131381044/64b430928e94.pdf
    • http://aguapotable.net/uploads/1/3/0/6/130620365/bulapisopagusidinus.pdf
    • http://unsubscribetoviolence.com/uploads/1/3/0/5/130588721/pekolatexalu_suvudo.pdf
    • http://antivenus.com/uploads/1/3/1/4/131453894/8556648.pdf
    • http://missgannonsclass.com/uploads/1/3/0/3/130313314/e93232efdb9.pdf
    • http://jewelry2013.com/uploads/1/3/0/4/130478123/dca18832e26.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_off0000654b.bin
1741d079468ef589fb89ec2b995bbc88809a9fe61d3018dd1e5c6c0d718d8ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 7272 bytes
font_01_sfnt_off00008045.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8045 2652 bytes

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