Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e472f93fdd81be…

MALICIOUS

PDF

34.3 KB Created: 2020-05-26 19:57:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ee95db64a72988c915eb301f534f52 SHA-1: 40adbd994b82981de8199230db172cbb74ca662b SHA-256: 11e472f93fdd81beaf58b5e8ef072cb63b1d200a4a8b97f56d70643a06578d06
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, suggesting a link farm or content distribution scheme. The ML classifier flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the presence of numerous external URLs indicates a potential for malicious content delivery or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://webdisk.digcitinstitute.com/uploads/1/3/0/8/130813509/130813509.html#multicast+address+ipv6
    • http://arielaluxuryhairline.com/uploads/1/3/0/9/130969776/xaxanujufamubalup.pdf
    • http://johndeere2000tractor.com/uploads/1/3/0/2/130272363/6182384.pdf
    • http://utahlandscapingsaltlakecity.com/uploads/1/3/1/4/131408248/1085098.pdf
    • http://drsandralee.net/uploads/1/3/1/4/131406049/befipape.pdf
    • http://shelbyjbates.com/uploads/1/3/0/5/130550787/banaxemediseb.pdf
    • http://elchristian.com/uploads/1/3/0/5/130540246/xewalelobawen_suduriw_weler.pdf
    • http://photographype.com/uploads/1/3/0/2/130288986/b04a9d80b89c217.pdf
    • http://southjerseyscores.com/uploads/1/3/0/9/130969718/voxaro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000596e.bin
ee92a0a72ee4a3e55716b09adf0aafaa7a81859f9412cebc6303023554054187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596E 10824 bytes

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