Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24a56c2e2ff1862…

MALICIOUS

PDF

41.1 KB Authoring application: pdf-parser
MD5: 0154302373cc03371d6d69bcb60e924b SHA-1: eaaf88c254b786a7f8203a83e383dda00724ca76 SHA-256: b24a56c2e2ff18629a6288d522039f7d9cb157ee049d23ec7c72b888f28aab20
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm with numerous external links, a common technique for distributing malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URLs likely lead to further stages of infection, such as downloading additional malware or redirecting to phishing sites.

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.
  • 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://charlescc.com/uploads/1/3/0/5/130538875/37f06c4ee.pdf
    • http://brownallyear.kiwi/uploads/1/3/0/6/130621162/bunurusisewumomim.pdf
    • http://rfleasingga.com/uploads/1/3/0/4/130483629/gevazutakax.pdf
    • http://jon.windowscaner.ru/uploads/2020/01/27/a5919.pdf
    • http://321markets.com/uploads/1/3/0/3/130379160/e686309109c40.pdf
    • http://waweru.cns-news.com/uploads/2020/01/28/3e1182b79f4f.pdf
    • http://gepabiteki.ez-knowledgebase.com/uploads/2020/01/27/e9d47117a.pdf
    • http://lmeclectique.com/uploads/1/3/0/4/130488105/didudog.pdf
    • http://asociacionperiodistaspr.org/uploads/1/3/0/6/130605389/915194.pdf
    • https://zunamifevaw.weebly.com/uploads/1/3/0/4/130477372/6296177.pdf
    • http://misbailes.com/uploads/1/3/0/2/130271073/130271073.html#uc+browser+hd+free++apk

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001238.bin
beee7d119ad6d669d68a5a1385e1f25888faeedf85ceb65e0770eae7d3012f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1238 8200 bytes
font_01_sfnt_off00005a15.bin
c6c28444bcd94379862b6cc7f8cfcdbcdaeb026857ccdb099d87626a561054a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A15 16092 bytes

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