Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce7472eac0cfbfc8…

MALICIOUS

PDF

31.4 KB Created: 2020-03-28 12:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a5a6d7a7744c7c98ea9012fb63bdfc1f SHA-1: 4a4882f949e39773a74395ff19f5caef3dbc0927 SHA-256: ce7472eac0cfbfc86f40ee7809c87b33dbbdaeb85664570abcde9cae124f6c8e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDF files on different domains. This suggests a link farm or SEO spam campaign. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the PDF structure and numerous external links are indicative of a malicious distribution or redirection scheme.

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://4angelstshirts.com/uploads/1/3/0/3/130379711/130379711.html#libros+de+texto+primaria+4+grado+historia
    • http://thelacunabrotherhood.com/uploads/1/3/0/2/130272232/sosunovugepozu.pdf
    • http://ciboinnova.com/uploads/1/3/0/2/130287291/3191591.pdf
    • http://webdisk.teacherbattleplans.com/uploads/1/3/0/5/130551962/tatidifuwoxomi.pdf
    • http://hostmaster.maesybont.wales/uploads/1/3/0/7/130740483/68587bed.pdf
    • http://europestylemonali.com/uploads/1/3/0/6/130604785/lakij_gozejubuzuluxez_tudivuzo.pdf
    • http://acardforyourmomcom.com/uploads/1/3/0/5/130590308/munore.pdf
    • http://pferdeheiler.eu/uploads/1/3/0/8/130814104/xojunibelewama_movevotaviradud.pdf
    • http://mbyj.net/uploads/1/3/0/2/130289315/4514733.pdf
    • http://progressivebuildingsystemsinc.com/uploads/1/3/0/2/130291592/63b3088fe32e1a.pdf
    • http://santicreations.com/uploads/1/3/0/5/130545365/4818519.pdf
    • http://blindpiggamesclub.com/uploads/1/3/1/1/131164534/pizem.pdf
    • http://lacedbyleshea.com/uploads/1/3/0/6/130604666/pejodumisu.pdf
    • http://calvaryyakima.org/uploads/1/3/0/6/130604568/nowaratusopofiwixep.pdf
    • http://theyellowvanfurnitureco.com/uploads/1/3/0/3/130379391/xevekefa.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_off00005271.bin
20b0fd4d1281ae0ed3772b073757238f63df3a566a960c5e2b7deac173474b6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5271 7688 bytes

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