Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfb492ac00f0260…

MALICIOUS

PDF

36.4 KB Authoring application: PDF Studio
MD5: b50aa6a0ae63ea929690ef482c0c6502 SHA-1: de05ea8813b40eec64fcf63ccae0e017e1ffb8e1 SHA-256: 7bfb492ac00f0260b4b792cbb68960d3c39b61be38f243c05fd4c610bd60be14
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are the primary IOCs, suggesting a link-based attack pattern.

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://villannabella.com/uploads/1/3/0/5/130551391/jepamirutigukezoso.pdf
    • http://cloudapitool.com/uploads/1/3/0/7/130740462/fumub_mugomuguxemikuz.pdf
    • http://ogdentowingservice.com/uploads/1/3/0/2/130289479/lamonar.pdf
    • http://brandmarketingconsultancy.com/uploads/1/3/0/5/130590244/fikiveji_kezogesupid.pdf
    • http://theesquiremovie.com/uploads/1/3/0/2/130273884/kukusojotupekez.pdf
    • http://mercedes.fit/uploads/1/3/0/3/130313507/begikune-rexapusaduroga-fofisofadoreli-nebogasowuf.pdf
    • http://speakeasyliverpool.com/uploads/1/3/0/7/130775843/8551889.pdf
    • http://theatrestudentunion.com/uploads/1/3/0/6/130639565/130639565.html#what+is+the+difference+between+placenta+previa+and+abruptio+placentae

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001209.bin
e31e7aebda102d4353261cc8d27a8ff8c4df67dc7b88b06677c2bd096bf3bcab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1209 8096 bytes

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