Malicious PDF — malware analysis report

Static analysis result for SHA-256 f650c24042d28a2a…

MALICIOUS

PDF

40.2 KB Created: 2020-11-08 23:33:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8314035d559d18061c9c67cf4b3cfda2 SHA-1: e533e03e0eee97f76d52787e432df535a9f40fdf SHA-256: f650c24042d28a2a016fbca3d806505940df0bb1a017c436fd4d3db20aed05b7
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://traffset.ru/aws?keyword=message+blocking+iphone+7 PDF link annotation
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/9e755944df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5fa4f3a7cbb8f.pdfIn PDF document text
    • https://wulonuvesiga.weebly.com/uploads/1/3/4/3/134362584/fapobodabas.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/mukitijaxuxisevoj.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/131740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5f98988f73cde.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/af108.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba690c84-b5f0-4e6f-8796-32f6cdd85d2f/tudier_le_signe_d_une_fonction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4dfe98-5cd0-48ee-a8de-87dd92f0ad46/rearrange_sentences_worksheet_for_class_8.pdfIn PDF document text
    • https://fareseba.files.wordpress.com/2020/11/powisozuwotezejoz.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9C 5388 bytes
SHA-256: df877f7e75e6f6ab465eb0e2dfd22894f8760e59ce373e8b4c61038793a24ef4
font_01_sfnt_off00006f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 11180 bytes
SHA-256: 223d96d2f283f48ed7845b0e5d065f340a3ffd26bd7eb68a6c61f27eb721ef1b