Malicious PDF — malware analysis report

Static analysis result for SHA-256 88eedfde48c90884…

MALICIOUS

PDF

36.0 KB Authoring application: Karbon
MD5: b63ab2f9c73b389f0c2188c4a9bf1490 SHA-1: 9386287540ee0dbef553e917d8e1d5ba6aad10d8 SHA-256: 88eedfde48c90884bc1e251db929d0de2aaa99901c930e014bfe3a96af04fa74
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate maliciousness. The embedded URLs are likely part of a link farm designed to redirect users to malicious sites or download further malware.

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://michelemoddesign.com/uploads/1/3/0/8/130873955/68a0d9201adb598.pdf
    • http://rotulossantiago.com/uploads/1/3/0/6/130620393/nalinofid.pdf
    • http://paverconcretesealing.com/uploads/1/3/0/4/130435561/bademejif-tunovefukot.pdf
    • http://design-diet.com/uploads/1/3/0/7/130775027/fuwufetufuwo.pdf
    • http://miamipwcparts.com/uploads/1/3/0/5/130550731/1497677.pdf
    • http://amberoni.com/uploads/1/3/0/2/130272270/galumawa-wowonesenok-famileza.pdf
    • http://nzacres2019.nz/uploads/1/3/0/7/130775451/f5a08ab.pdf
    • http://sportzillaonline.com/uploads/1/3/0/8/130814758/fawulug_japafoje_sutomad.pdf
    • http://btctree.net/uploads/1/3/0/5/130544118/7970445.pdf
    • http://www.innerlinkservices.com/uploads/1/3/0/7/130740498/914829.pdf
    • http://www.gobws.net/uploads/1/3/0/6/130604091/bexepim.pdf
    • http://haiyi-carriageinnsf.devsite-1.com/uploads/1/3/0/5/130544318/130544318.html#herman+miller+aeron+parts+uk

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000342e.bin
7709b684c7ddf760265b9520531b66836266158b836b2029cf94839f490f7564		 pdf-font-stream PDF embedded font (sfnt) at offset 0x342E 8532 bytes

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