Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b710e801c986fc7…

MALICIOUS

PDF

53.2 KB Created: 2020-05-06 07:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-07
MD5: 3d2e9c4df3923bacb649a838e4aa97b4 SHA-1: ca6af89c712e226c58bbcc88a9c01bd7902361e6 SHA-256: 2b710e801c986fc76ca7470b70e528db2e4dcdc2f51725b3c2260bfd4f50c73c
136 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or SEO poisoning tactic. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing software, likely to facilitate further malicious activity. The presence of numerous unknown URLs associated with this lure increases the likelihood of a malicious download or redirect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://masonleigh.com/uploads/1/3/0/2/130289504/130289504.html#free+adblock+app+for+android PDF link annotation
    • http://ready2mow.online/uploads/1/3/0/9/130968973/nixigomubonowuv.pdfIn PDF document text
    • http://greenwoodpropertydevelopers.com/uploads/1/3/0/8/130813320/pojavuzu.pdfIn PDF document text
    • http://larrydthornton.com/uploads/1/3/0/3/130313428/636577.pdfIn PDF document text
    • http://zeetadollhouse.com/uploads/1/3/0/7/130740590/jenaxusi-jazus-geruwulipi.pdfIn PDF document text
    • http://hortx.com/uploads/1/3/0/6/130604424/mekerokokore.pdfIn PDF document text
    • http://regardingcocktails.com/uploads/1/3/0/7/130776325/bb4eaa800c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA540 10576 bytes
SHA-256: e08e7c32e8bb04fe7ccb7cf5214e8f968c55be5440ba35a81b6d6c41937b6a1d

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