Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da209676e4666bf…

MALICIOUS

PDF

42.0 KB Created: 2020-11-08 09:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 6a5cf5d9d743741590d43aaeff9658b7 SHA-1: 3848be0c35593a34e5c30707de91b71f677ca5e7 SHA-256: 8da209676e4666bfacf29e3cc42c2a9e09fc94d5e07b5f4199f02ab4eacba9d9
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=idea+zero+reject+summary PDF link annotation
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/58aa4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383567/normal_5fa361450d6eb.pdfIn PDF document text
    • https://vamekatowozi.weebly.com/uploads/1/3/0/8/130814347/38af4a71d10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5fa55413c33c9.pdfIn PDF document text
    • https://bugemimeme.weebly.com/uploads/1/3/4/4/134403979/powopobu_vobol_piduriga_zuvado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://riroxoposej.files.wordpress.com/2020/11/37512067338.pdfIn PDF document text
    • https://jezadamoz.files.wordpress.com/2020/11/luwevegaga.pdfIn PDF document text
    • https://povojoboxep.files.wordpress.com/2020/11/rilegunubofulugapekabuduv.pdfIn PDF document text
    • https://puforevux.files.wordpress.com/2020/11/25218140081.pdfIn PDF document text
    • https://sorogigavid.files.wordpress.com/2020/11/document_a_henderson_letter_guiding_questions_answers.pdfIn PDF document text
    • https://kunebufapa.files.wordpress.com/2020/11/32490916746.pdfIn PDF document text
    • https://mikifisilub.files.wordpress.com/2020/11/52101485761.pdfIn PDF document text
    • https://kifakelezek.files.wordpress.com/2020/11/56918330863.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_off0000655c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655C 5216 bytes
SHA-256: d35033358dfdb171fa264858e1f7710d114ea03f063015149d6ad52dde40543b
font_01_sfnt_off00007714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 10752 bytes
SHA-256: aa20aa274f56b1b87bd859dd45b1bae5473a612d0326fbaa1428bf8985b0bdf2

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