Malicious PDF — malware analysis report

Static analysis result for SHA-256 89cdc5fce7fedb1a…

MALICIOUS

PDF

36.0 KB Created: 2020-04-07 02:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cdfd131c6440f8ad802ae0b81143c2d1 SHA-1: 01f1cc91838af7a81693a39e987e456b863ad8c1 SHA-256: 89cdc5fce7fedb1aeaca22e2d8563a5e7182ae0a09dcdb3d6d251aaa4077d686
94 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, identified as a 'PDF SEO LINK FARM' heuristic. The document body, though heavily obfuscated, also contains URLs pointing to external domains. These factors suggest the primary purpose is to redirect users to a network of websites, likely for malicious SEO or to host further attack stages.

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://drywallnewmarket.com/uploads/1/3/1/4/131453871/131453871.html#ejemplos+de+gramatica+descriptiva
    • http://kagans.com/uploads/1/3/0/6/130620795/penebafufererin.pdf
    • http://beechpropertiesllc.com/uploads/1/3/0/7/130776343/puwegi-wimurabelukomam-jabovipij-gizigevezifo.pdf
    • http://makeittothemerge.com/uploads/1/3/0/8/130874079/7469518.pdf
    • http://spaceaboveltd.com/uploads/1/3/1/1/131164100/6013547.pdf
    • http://olofpetersson.com/uploads/1/3/0/5/130589260/2385520.pdf
    • http://timshew.com/uploads/1/3/1/0/131070847/bajufikowipiboki.pdf
    • http://nordicactiongroup.com/uploads/1/3/0/6/130639889/5319169.pdf
    • http://hartmanconstruction.net/uploads/1/3/0/7/130775710/zekez_susutelasob.pdf
    • http://spokanehomefuneral.com/uploads/1/3/0/6/130603968/00f35f29aeceac.pdf
    • http://onboardxpress.com/uploads/1/3/0/4/130476502/wamuwimobi-zijugimukafa-kowusawuw.pdf
    • http://cannabismineralworks.com/uploads/1/3/1/4/131438419/6c88db.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_off000065bd.bin
fb2e06f3d3b596e56212992ebac760a9f2d57d5ecf42544d1399fed80193e355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 8108 bytes

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