Malicious PDF — malware analysis report

Static analysis result for SHA-256 129be739bf373b1a…

MALICIOUS

PDF

54.2 KB Created: 2020-10-26 13:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5f9e9aa2ec2c90ea690008808819561b SHA-1: 9f797abbad48ad4af087f7fb2a18c4301f155797 SHA-256: 129be739bf373b1abf57b9e5949317c92e99d6d9eca3be4bcab30b5399dbe56f
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://cctraff.ru/aws?keyword=reasoning+book+pdf+in+hindi+2019 In PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/gezoxaxefam.pdfIn PDF document text
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/fitonumijebarovepiso.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/32708f917bd167e.pdfIn PDF document text
    • https://xabejopoturidu.weebly.com/uploads/1/3/4/3/134352457/xejav.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/2b1fca022bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_5f9181734f0b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f95860fb8367.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f92a35b9e7cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379736/normal_5f9451af6a471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f870158b84f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f90cd3d527a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006cdd.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006cdd.bin)
    • http://fedorahosted.org/lohitIn extracted file (font_02_sfnt_off0000a609.bin)
    • https://cdn.shopify.com/s/files/1/0494/6074/0263/files/davofixuzotunimage.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/jexezep.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/free_tree_house_building_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/kotopapesisuga.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/jutufuguzab.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/16947737577.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/toboseboxagimeso.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/52338914590.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00006cdd.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDD 5868 bytes
SHA-256: 6fa7729759540021fc00bd6e14aedc8249d8580bdf11c952e823c92fad44733b
font_01_sfnt_off000080d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 10820 bytes
SHA-256: e453fdb06f6d916d68b3b386c7857c598b66763da1fc93e34f0f0342b641fcaf
font_02_sfnt_off0000a609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA609 12332 bytes
SHA-256: c6de5b2419d1b8a2ecaef7d283579345cd6c668dfbcc62fb6d3f69bc2e2836f5