Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbb15f3d2d3f020f…

MALICIOUS

PDF

35.9 KB Authoring application: Poppler-utils
MD5: bed493d87d085298ebad7a063a54d756 SHA-1: 8ab81ef9693e2be00cd14c3cfcb3100516d89a15 SHA-256: cbb15f3d2d3f020f8fe39f62ef3c2df9200d13eec7a5efd5e5eef009253f9172
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a traffic redirection mechanism. The embedded URLs are the primary indicators of compromise, likely serving as lures to 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 http://deeprootsmountainrevival.com/uploads/1/3/0/3/130324137/bofobikawajarituvafa.pdf
    • http://xon.xalat24.ru/uploads/2020/01/29/wamekijetofeta.pdf
    • http://thelaunch.team/uploads/1/3/0/5/130542865/77a6c0d6650.pdf
    • http://resolute-sf.com/uploads/1/3/0/5/130543539/fe43b6.pdf
    • http://juliejesternewman.com/uploads/1/3/0/4/130488736/130488736.html#chain+of+custody+evidence+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00000fe0.bin
de6f2f084289387d0c3a5bc53f53a321f64766d955b010a77805a9768285b183		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0 7600 bytes

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