Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bdf0501b509aaa…

MALICIOUS

PDF

37.7 KB Created: 2020-04-06 10:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 59e60d13ac039468bd1ad56f8cb29733 SHA-1: a010d9d2913a1778159aec6e9bc368925754b3ba SHA-256: 69bdf0501b509aaa99ddbd8b1acc6894e767f828bfcd4986469d18ab5453f06a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The embedded document body also contains a URL, which is likely part of a link farm or SEO manipulation scheme. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://edwardsautomotivemillingandi.com/uploads/1/3/0/8/130874220/130874220.html#motor+electrico+y+sus+partes+dibujo
    • http://isaacdelislefoundation.org/uploads/1/3/1/0/131070377/a79956.pdf
    • http://kentwoodusedcar.com/uploads/1/3/0/5/130550903/dobanatijukepez-vupedidazu-nonibufulaken.pdf
    • http://infinityandbeyondco.com/uploads/1/3/0/7/130775570/jeritagow.pdf
    • http://trionntechnologies.com/uploads/1/3/0/5/130589171/159935.pdf
    • http://thewxlves.com/uploads/1/3/0/7/130775796/c46b2baba.pdf
    • http://acusomatics.com/uploads/1/3/0/7/130775053/pijaferele_gononoru_valomef_fidosolekuzup.pdf
    • http://maralindbergh.com/uploads/1/3/0/6/130639464/worunesim.pdf
    • http://globalecolimpeza.com/uploads/1/3/0/3/130379252/nimofifikalaxidu.pdf
    • http://restaurantelenador.es/uploads/1/3/1/4/131453081/dukajokeraxiredexero.pdf
    • http://recovery-focused-living.com/uploads/1/3/1/3/131381761/bobarivipuvo-sukuro-boxopeguvuti.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_off0000688f.bin
81d7512a5e50d4d3462f52ffe8a6f4c58e4181bef49fa5ddf7e6374de8f89118		 pdf-font-stream PDF embedded font (sfnt) at offset 0x688F 8628 bytes

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