Malicious PDF — malware analysis report

Static analysis result for SHA-256 430c7abfbc2b3774…

MALICIOUS

PDF

42.8 KB Created: 2020-11-08 04:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: 8f9b022251295318397dfccdc98d3615 SHA-1: ea9fb08dfbcb9bc96fb8ab7b65e453a2d00d3ce8 SHA-256: 430c7abfbc2b377485a0846e6068f907e00ea878267c88aa3b379c49ff9ff224
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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 https://trafficel.ru/123?keyword=6-2+practice+parallelograms+answers PDF link annotation
    • https://joxiwawetesamiv.weebly.com/uploads/1/3/4/3/134306419/powenaz.pdfIn PDF document text
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/307cd71860b28b5.pdfIn PDF document text
    • https://tikedamo.weebly.com/uploads/1/3/1/4/131453682/2479b4095aae4d5.pdfIn PDF document text
    • https://zupuxugemewizo.weebly.com/uploads/1/3/4/3/134309945/femowumodiduse.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/janisejeve.pdfIn PDF document text
    • https://gonoloxezejuje.weebly.com/uploads/1/3/1/4/131410007/05475541c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413111/normal_5f9f20a021985.pdfIn PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/3921597.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/juxuka_lujanopone_lixufipo.pdfIn PDF document text
    • https://xunowarusaki.weebly.com/uploads/1/3/4/3/134371630/9ef011cdb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f8bfe3ea25e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000064f8.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000064f8.bin)
    • https://uploads.strikinglycdn.com/files/2ebbdc07-641a-4c1e-a01a-4ccb1c42ee53/17026162854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb13c81-a5b2-4ea9-9711-02ac9c9daf9b/98734378604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b07ef71-e576-4ed7-ad74-3b09d3899829/96904414320.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_off000064f8.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F8 5568 bytes
SHA-256: 0ee745a53c76e11998d0ac520a09c4dce1dc0500d0156ee5ae1877978501a0b9
font_01_sfnt_off000077ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77EA 11272 bytes
SHA-256: b6c8cd0bbe07a2f6450926a937ebe502eff77d4dd8b65f4a95cb2b2c34062f78