Malicious PDF — malware analysis report

Static analysis result for SHA-256 7108565f4817fd6f…

MALICIOUS

PDF

96.1 KB Created: 2020-06-04 17:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 594f13c7df3460d40da5bd494e2deb98 SHA-1: 77d1f2d87a2cc3e85e22b2540e9d94625ac8cd40 SHA-256: 7108565f4817fd6f1191fc5b4e0405682a4e42861725d84c065b2732b4d9a06e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which point to domains structured for SEO or link farming, suggesting a malicious intent to drive traffic. The document body text, though partially corrupted, includes a URL that appears to be the primary lure, directing users to a webpage that likely hosts malicious content or phishing forms. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://0fyq5.bpmtc.com/uploads/1/3/1/4/131410009/131410009.html#specters+of+marx+pdf
    • http://groebernhof.de/uploads/1/3/0/6/130604196/gimipot_kefilimu_wixulesoxunikij.pdf
    • http://millenniuminternational.biz/uploads/1/3/0/6/130639706/sifuzogegosuvixef.pdf
    • http://tomhartsfield.com/uploads/1/3/0/5/130550724/natoropodalir.pdf
    • http://0fyq5.bpmtc.com/uploads/1/3/1/4/131410009/terms.html
    • http://0fyq5.bpmtc.com/uploads/1/3/1/4/131410009/dmca.html
    • http://0fyq5.bpmtc.com/uploads/1/3/1/4/131410009/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://nusakotibo.files.wordpress.com/2020/06/jepobutodunubirok.pdf
    • https://witudekodi.files.wordpress.com/2020/06/dukelusikewasoxujirufod.pdf
    • https://rejutunav.files.wordpress.com/2020/06/vobepaleraluzaturitad.pdf
    • https://pofunidasuz.files.wordpress.com/2020/06/zodejikiriv.pdf
    • https://jajafer.files.wordpress.com/2020/06/rupuwabiworedegum.pdf
    • https://wubegupo.files.wordpress.com/2020/06/55662656982.pdf
    • https://gapepuzowafu.files.wordpress.com/2020/06/kewobamuvugovuxazuvis.pdf
    • https://todaxepek.files.wordpress.com/2020/06/bagokararugajasobuxo.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_off00014e6b.bin
10447d1f52601e9814124278018a3a6c98c80b678c0c10397599d9dadf5f2227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E6B 11896 bytes

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