Malicious PDF — malware analysis report

Static analysis result for SHA-256 256507e2e06d98d3…

MALICIOUS

PDF

43.0 KB Authoring application: PDFedit
MD5: a7accebcd2f766c76374dfc3a0a88cef SHA-1: e6338276f4c470aada1657fddd8d17ad81b7621e SHA-256: 256507e2e06d98d3f8b4c1831e6e21d142066b7a949121a79b4f8451ed4ca93c
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted, but the heuristic 'PDF_SEO_LINK_FARM' and the sheer volume of external links suggest a campaign focused on driving traffic to potentially compromised or malicious 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://doceinstein.com/uploads/1/3/0/3/130323612/jalijejavoz.pdf
    • http://radtacular.net/uploads/1/3/0/7/130775277/kujupipigud.pdf
    • http://dnsprotools.com/uploads/1/3/0/6/130639224/7325053.pdf
    • http://glslang.org/uploads/1/3/0/2/130271150/zituvilakovuve.pdf
    • http://natalieberry.net/uploads/1/3/0/6/130605094/2d10baf0a401cc.pdf
    • http://oratert.host/uploads/1/3/0/4/130435710/03b76b776327d6d.pdf
    • http://sitesubject.com/uploads/1/3/0/7/130775842/lesamebilipe.pdf
    • http://mail.vailvalleybaptistchurch.org/uploads/1/3/0/5/130589187/mevoz.pdf
    • http://optodev.org/uploads/1/3/0/5/130588499/zixinunuroroza.pdf
    • http://the-rising-sea.com/uploads/1/3/0/8/130874521/1831125.pdf
    • http://2021cruises.com/uploads/1/3/0/8/130815008/425679.pdf
    • http://fishtalesoup.com/uploads/1/3/0/5/130539336/nosemufofiw_defojav_mukowi.pdf
    • http://wizzteam.space/uploads/1/3/0/6/130639546/1065987.pdf
    • http://www.simplygeek.com.au/uploads/1/3/0/4/130477702/130477702.html#astrostyle+astrology+chart
    • http://radtacular.net/uploads/1/3/0

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ee9.bin
5dfeef3199ccd3be211afaa41b6d9a81a7d0b24ee69d1f7ce7b8dd81c77c5637		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE9 8372 bytes

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