Malicious PDF — malware analysis report

Static analysis result for SHA-256 261444288116354e…

MALICIOUS

PDF

35.5 KB Created: 2020-04-12 05:40:35 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: dc0d6071ed433578a54586b834dad8c9 SHA-1: c1a68c2d96efd5120ca198eb5cdb83ffd1f26f9b SHA-256: 261444288116354e09989b1601c7aca74eb95606ff834f6802bd4fbd76088eec
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be SEO manipulation or directing users to potentially malicious content hosted on domains like iglootw.com and materialsdesign.net. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://iglootw.com/uploads/1/3/0/3/130313242/130313242.html#metro+incident+in+delhi
    • http://materialsdesign.net/uploads/1/3/1/4/131482930/37217cc71.pdf
    • http://theukrainianwedding.com/uploads/1/3/0/3/130313015/3294864.pdf
    • http://theordinarychaos.com/uploads/1/3/1/4/131407047/fumezifipadeko_ninufi_xikepimu.pdf
    • http://joegotaboat.com/uploads/1/3/1/0/131070178/soxuliposup.pdf
    • http://hollywoodlatinatv.com/uploads/1/3/1/3/131384516/4144614.pdf
    • http://theordinarychaos.com/uploads/1/3/1/4/13
    • 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_off000063aa.bin
038dadb2594316169b103bc3d2b968a6ccd755c8647aaf59bf2dbe01e05f60c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AA 8196 bytes

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