Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be09a2bad135362…

MALICIOUS

PDF

39.0 KB Created: 2020-04-06 12:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a995e704226d4eaafc62ea02bddb89df SHA-1: e4e318a55e7aa3918d39420c4095b0a7db5750ad SHA-256: 2be09a2bad1353621044a7d31f7ee349abfc8f4eb762a4fe45e86201e146d57f
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique commonly used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains URLs that are part of this link farm. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.Dropper.Agent-8634535-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8634535-0
  • 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://thepaintersperspective.com/uploads/1/3/0/8/130814529/130814529.html#secciones+conicas+y+ecuaciones
    • http://camarederieltd.org/uploads/1/3/0/5/130550774/fisakebenavawolosi.pdf
    • http://mta-sts.rhgcfexsrv1.raffertyholdings.com/uploads/1/3/0/7/130739827/2263503.pdf
    • http://theadccourse.com/uploads/1/3/0/2/130272925/kevejawega_puwekigud_pametuzure.pdf
    • http://socialenvironmentsenhancement.com/uploads/1/3/0/6/130639821/godidulosi.pdf
    • http://microaccess.org/uploads/1/3/1/3/131383813/7179757.pdf
    • http://erinsauer.com/uploads/1/3/0/6/130639924/3812566.pdf
    • http://condonarchitecturalhardware.com/uploads/1/3/0/9/130969474/talidajeguxuvizib.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_off00007062.bin
b710f5ceff1447fe90a95f115850fe79045adf358247957c4beb689276ad976f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7062 8476 bytes

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