Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8f4c45f8f5d64d…

MALICIOUS

PDF

38.1 KB Created: 2020-04-02 17:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ea90af8224a9a62f3ec5aeba8e85d99c SHA-1: ec38d006e98be01f52454a637fa091040cccfbbf SHA-256: 0b8f4c45f8f5d64da14f2e563de702e7eddc532e433cdb0aef54c04133312c6e
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a mass external link farm. While no scripts were directly extracted, the presence of numerous URLs suggests a potential for further malicious activity or redirection.

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://iankwalker.com/uploads/1/3/0/7/130775660/130775660.html#semi+pro+football+sponsorship+packag
    • http://ennellgroup.com/uploads/1/3/0/5/130543239/ziwof.pdf
    • http://blakeleysmobilemechanic.com/uploads/1/3/0/7/130740221/f498ae.pdf
    • http://tustincbf.com/uploads/1/3/0/7/130775115/881f658a746df5.pdf
    • http://abundantyoga.com.au/uploads/1/3/0/8/130813757/4487f06.pdf
    • http://transform-together.org/uploads/1/3/0/5/130541688/jomomivelu.pdf
    • http://karen-griffiths.com/uploads/1/3/0/6/130604798/vazizinagivufe_midezen_gikofuze.pdf
    • http://lifeofastreetdog.com/uploads/1/3/0/8/130813841/vatedirifozebu.pdf
    • http://unitedhaitiansofamerica.com/uploads/1/3/0/5/130551754/3954d1d975.pdf
    • http://saternamusic.com/uploads/1/3/0/7/130738555/bozaxilonebola.pdf
    • http://sty7esbeats.com/uploads/1/3/0/6/130604026/2654055.pdf
    • http://shopaspectsquad.com/uploads/1/3/0/6/130605393/kikekemiw.pdf
    • http://mikemelaragno.com/uploads/1/3/0/7/130776514/bejalizib_rabopowi_juwejem.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_off00006d71.bin
86d2083f4904d4fd69d1c833cbe75c466f7e052afb07c78f56505ef4fd7500f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D71 7572 bytes

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