Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7aa7d93a890936…

MALICIOUS

PDF

39.0 KB Created: 2020-03-30 04:02:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d4b4cc7b307f9e401ab17d117e3fbd4d SHA-1: e95f3cff21989a6597a04530c8e32ff42ab0a967 SHA-256: fe7aa7d93a890936efed319b95444309c67a6ceb3919a887b50088fe0fbfee2f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a "link farm" heuristic. The document body, though heavily obfuscated, contains references to URLs that are also present in the link farm. This suggests the primary purpose is to direct users to a network of external sites, likely for SEO manipulation or to host further malicious content.

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://starkdkirbyjr.com/uploads/1/3/0/7/130740458/130740458.html#diehard+battery+charger+200+amp
    • http://bpmsreunion.com/uploads/1/3/0/5/130588216/09fdf7ab4d3.pdf
    • http://carmichaelactingstudio.com/uploads/1/3/0/2/130288599/7225693.pdf
    • http://verkauf.studio/uploads/1/3/1/0/131070113/6978751.pdf
    • http://lahaciendamx.com/uploads/1/3/0/6/130621781/68c95180c5d136.pdf
    • http://www.mission3075.org/uploads/1/3/1/3/131380848/pitidolavane.pdf
    • http://yourrussianrivertownhouse.com/uploads/1/3/0/7/130738974/talapokikolito_jokujaditewafa.pdf
    • http://jabuspeaks.net/uploads/1/3/0/9/130969221/2547639.pdf
    • http://marionindustrial.com/uploads/1/3/0/5/130543032/muterumebasovi-sipotok.pdf
    • http://anderson-sean.com/uploads/1/3/0/5/130588288/7294139f9.pdf
    • http://mawilabs.com/uploads/1/3/0/2/130272609/bufarud.pdf
    • http://piperikuk.com/uploads/1/3/0/8/130814562/jazafijij_setiv.pdf
    • http://echelonaerial.com/uploads/1/3/0/6/130604077/6938d72f5f.pdf
    • http://spencerbarnor.com/uploads/1/3/0/6/130605389/3444303.pdf
    • http://jolenesphotography.com/uploads/1/3/0/9/130969973/dodatoreteralu-venotukuwapaf-mituralutoj-bogosave.pdf
    • http://seattlesadtherapy.com/uploads/1/3/0/4/130483990/fd941cc46726.pdf
    • http://deercoveresort.com/uploads/1/3/1/3/131379846/vunaxumudot_zivaravar_ripiji_vexudugobuxiwi.pdf
    • http://bioanimations.com/uploads/1/3/0/9/130969192/xinakalebav-gezuti-povugu.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_off00006cd2.bin
2bda836e6278507748dac38929f32c4dbf161696bbc4f1cda17019821f9daaac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD2 8440 bytes

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