Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f090187de721f2…

MALICIOUS

PDF

52.2 KB Authoring application: Karbon
MD5: 158a2b5e82b39478fa4052a63fed52bd SHA-1: 41565e665bcdf11f2baade3e7708e42d90ca0ae8 SHA-256: a6f090187de721f208a57a9a183b2289a82e62b6a83892e061489070f1345470
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to other PDF files hosted on various domains, indicating a link farm designed to distribute malicious content. ClamAV detection as 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier's high confidence score further support the malicious nature of this document. The embedded links are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://libraconsultoria.com.br/uploads/1/3/0/3/130323794/daxexi_lijopoxakoj.pdf
    • http://taggroup.nz/uploads/1/3/0/4/130483138/faboz_miripeb.pdf
    • http://tubapuvul.sexshop-extra.ru/uploads/2020/01/28/zopuko_lusifapatixono.pdf
    • http://morethanfood.net/uploads/1/3/0/5/130539244/mifatogebemono-xagizaz.pdf
    • http://jijap.qpeqwqj.info/uploads/2020/01/28/fusizatige.pdf
    • http://whitebeamphotography.co.uk/uploads/1/3/0/5/130539338/8782319.pdf
    • http://votepedrini.com/uploads/1/3/0/6/130621610/98397114c5.pdf
    • http://biodanzacuerpoyalma.com/uploads/1/3/0/6/130605267/sitenojovusaxa.pdf
    • http://nashobavalleyextractco.com/uploads/1/3/0/2/130271142/130271142.html#auditoria+seguridad+informatica+ejemplo

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000111e.bin
84e829effeb40e870cd1caed26665702c4d676fd7cb0561f2bdbffc958d73deb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111E 9972 bytes

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