Malicious PDF — malware analysis report

Static analysis result for SHA-256 c64e967570188202…

MALICIOUS

PDF

36.3 KB Authoring application: Inkscape
MD5: 15b9b6e0e6a89d30965536010beed5cf SHA-1: 3e0e0368bfdfe34588fa5f77d2f4537e1fbef534 SHA-256: c64e96757018820216d4d3e848347e40448643a10522f43f8d50129405a9bf46
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded URLs pointing to external PDF files, indicating a link farm or a distribution mechanism for further malicious content. The primary heuristic 'PDF_SEO_LINK_FARM' explicitly details the mass external PDF link farm, with the first URL being http://walkerlessons.com/uploads/1/3/0/6/130621206/vejifekujelekubabo.pdf.

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://walkerlessons.com/uploads/1/3/0/6/130621206/vejifekujelekubabo.pdf
    • https://tomobotefagat.weebly.com/uploads/1/3/0/5/130539155/majalaloril.pdf
    • http://shuttcv.com/uploads/1/3/0/4/130483632/4324564.pdf
    • http://istemeducation.net/uploads/1/3/0/2/130289371/posasejedi.pdf
    • http://nancerealtyservices.com/uploads/1/3/0/4/130483204/7289918.pdf
    • http://as13.com/uploads/1/3/0/2/130271207/ranal_kuvazisosevole_xexijidako.pdf
    • http://denverlawreview.club/uploads/1/3/0/2/130272909/tugerowe.pdf
    • http://smartliftvest.net/uploads/1/3/0/6/130622110/wuzaliku_milokegidir_lawuje_webida.pdf
    • http://xerosi.dawhdsads.icu/uploads/2020/01/29/boneguvurik.pdf
    • http://newholland4wdtractor.com/uploads/1/3/0/6/130621831/kivutafanizijizi.pdf
    • http://writing4content.com/uploads/1/3/0/4/130488979/130488979.html#coreldraw+banner+template

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000129f.bin
60aba54e067953f8642a1f2b3ec9126c6e4f7aa0d1c73773d92e928e36f14f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129F 8280 bytes

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