Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f39f0a9cf97ac66…

MALICIOUS

PDF

68.6 KB Authoring application: Pdftk
MD5: 045fb56996952242c461c68dc99aa92a SHA-1: 3caadf18423dc01d26a254979d23a71a6e3c724c SHA-256: 0f39f0a9cf97ac66c586c85c86e9ad14e03b938d3887a164935a35845ec07f2c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, a technique commonly used for SEO poisoning or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs are the primary indicators of compromise, suggesting a redirection or download scheme.

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://nyc-visa.weebly.com/uploads/1/3/0/5/130588849/weviv.pdf
    • http://breakgroundkidscode.com/uploads/1/3/0/5/130588380/7548142.pdf
    • http://dressuwell.ru/uploads/2020/01/28/rolalavalewekil_dojejaxa.pdf
    • http://sherlockhomesstl.com/uploads/1/3/0/5/130550711/2537dd81657a8ee.pdf
    • http://johnshordike.net/uploads/1/3/0/3/130379137/berezufage_sumajenapod.pdf
    • http://woodlandswomensexpo.com/uploads/1/3/0/3/130313610/kudupud.pdf
    • http://divorcecoachchicago.com/uploads/1/3/0/5/130544468/bexisogizepi.pdf
    • http://dgtallmarketing.com/uploads/1/3/0/5/130588695/gigepozawazok_fuludabonem_pofuxe.pdf
    • http://abramsflooring.com/uploads/1/3/0/3/130323139/995d9537282.pdf
    • http://nutritionsheila.com/uploads/1/3/0/6/130621228/5896998.pdf
    • http://nimenefu.kuhni-msc005.icu/uploads/2020/01/29/9774214.pdf
    • http://kylaconner.com/uploads/1/3/0/6/130639706/130639706.html#cinematography+techniques+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000013af.bin
5c1f42978080830e650805a7ecbe490a80e224f8c79d6661cb554ae902f8e772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF 8892 bytes
font_01_sfnt_off0000be86.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE86 2652 bytes
font_02_sfnt_off0000c754.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC754 16036 bytes

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