Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2e696c0823edf0…

MALICIOUS

PDF

37.9 KB Authoring application: Karbon
MD5: ce5592c51a068f427d2b2285008ae991 SHA-1: 12bf5dcc08f012a4dd52fe4b9134e8f3eda3f3fa SHA-256: bc2e696c0823edf0efc87a919eb61951f102400ad34ab86b2fc0d1ee89ccbe2a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a PDF SEO link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically related to phishing or traffic redirection. The document body, while heavily obfuscated, contains references to URLs that are likely part of this link farm, aiming to direct users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://lafonojator.weebly.com/uploads/1/3/0/5/130546497/2366073.pdf
    • http://gezu.dermashop.tech/uploads/2020/01/29/zujosevej-saputojelo-bokafevapipuwi-lafibubi.pdf
    • http://english-log-cabins.com/uploads/1/3/0/5/130590205/zukexotoloji-silavifisus-tenazo-sudugu.pdf
    • http://iaade.org/uploads/2020/01/28/xonobopeje.pdf
    • http://riversidecountyhistory.org/uploads/1/3/0/2/130271159/130271159.html#2016+chevy+traverse+lt+owners+manual

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000109f.bin
b0cc2b9c51db84c2664355041dd1744a78693ac8c86acc415d19c371e446c0f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109F 8332 bytes

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