Malicious PDF — malware analysis report

Static analysis result for SHA-256 1022d112a1f116eb…

MALICIOUS

PDF

34.5 KB Created: 2020-06-02 21:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea8cb3c7473f3ed3e7eec2caa1499fb1 SHA-1: 454c946d0a8f1042837bb12d5c5afe4ef9ad5918 SHA-256: 1022d112a1f116eb5df4883c8c9b638be917a3cc5f8a14c0836ae431385410a7
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to direct users to potentially harmful content. The ML classifier also strongly indicated maliciousness. The embedded URLs are the primary indicators of compromise, pointing to external resources that are likely part of a malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://host225.carmichaelnl.com/uploads/1/3/1/4/131436967/131436967.html#l%2527empereur+de+paris+uptobox
    • http://itshuh-ministry.org/uploads/1/3/0/5/130541211/8464292.pdf
    • http://clinicgeek.org/uploads/1/3/1/8/131857305/wamugabunasaza-raxadera-wikumazidik-xenonon.pdf
    • http://gwwatersolutions.com/uploads/1/3/0/6/130604820/zivivabizu.pdf
    • http://markosportdogs.info/uploads/1/3/0/5/130588554/dejomedegoligeb-jezisuluvaniwaz-sujubag.pdf
    • http://host225.carmichaelnl.com/uploads/1/3/1/4/131436967/terms.html
    • http://host225.carmichaelnl.com/uploads/1/3/1/4/131436967/dmca.html
    • http://host225.carmichaelnl.com/uploads/1/3/1/4/131436967/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://majobuvunaga.files.wordpress.com/2020/05/58301118017.pdf
    • https://kakonowa.files.wordpress.com/2020/05/sesupeju.pdf
    • https://fitarevete.files.wordpress.com/2020/05/juxunab.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058b1.bin
f263244c56c66acc524c8dd02d16ca40cbff5a6047ef83415bc618f1649acaba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B1 12192 bytes

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