Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b893a3cb0693bb…

MALICIOUS

PDF

40.5 KB Created: 2020-04-10 10:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bab8f09b1f8d71f7a6c459be10f868a1 SHA-1: 131baba22a85afa0a2b21aad9d292260ff53df43 SHA-256: d5b893a3cb0693bbf455e41801f7ffac83e1905820a0302be43f10a948f41f36
92 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body, though partially corrupted, contains text related to 'healthy smoothie recipes' and the wkhtmltopdf application, suggesting a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to lead users to potentially harmful content.

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://marbledsilkartbyc.com/uploads/1/3/1/4/131437548/131437548.html#healthy+smoothie+recipes+using+greek+yogurt
    • http://bunnypro.com/uploads/1/3/1/3/131379017/tunipimax-poxesufari-lazozakiwuka.pdf
    • http://travelnbrushes.com/uploads/1/3/0/3/130313613/niwedurujemef.pdf
    • http://jacobklaus.com/uploads/1/3/0/4/130436188/dogotovefifaxo_lazukelir.pdf
    • http://casbaad.it/uploads/1/3/1/4/131407492/wajuxepogemiditimi.pdf
    • http://glendalekfss.com/uploads/1/3/0/8/130813851/ac2e3e261a277.pdf
    • http://labella1boutique.com/uploads/1/3/0/7/130739944/fosetefijubolavo.pdf
    • http://hellojesskay.com/uploads/1/3/0/5/130551364/1451602.pdf
    • http://bbnh.shop/uploads/1/3/0/7/130740537/8119196.pdf
    • http://planarmaterials.com/uploads/1/3/1/4/131438788/7316105.pdf
    • http://mjseanor.com/uploads/1/3/0/6/130604836/dumegigenonowuda.pdf
    • http://scienceforkidz.com/uploads/1/3/0/5/130590154/9747553.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000750c.bin
91f41f5cb58222db83310e7d14309fdaf1024f5935649f5bc2b50fbe7668ea35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750C 8228 bytes

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