Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e43e78b03eefba8…

MALICIOUS

PDF

46.5 KB Created: 2020-11-09 03:39:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: d890b4b91b150687f1abdb8227fc9fe4 SHA-1: 2a488098d4a00f71f7f50fa295a8928350fd858a SHA-256: 5e43e78b03eefba89e1f38cceb4998b8376e06ce9495a8cc90fe21a99849f3d7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffking.ru/123?keyword=group+1+periodic+table+of+elements In PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/3fab47.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/maliwu_xuzifupagewo_lateduguwasex.pdfIn PDF document text
    • https://suzokapiwewop.weebly.com/uploads/1/3/4/3/134351383/kugoje-bojitepe-jivodeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f9a9b324c642.pdfIn PDF document text
    • https://zirodaxe.weebly.com/uploads/1/3/4/6/134611642/7da5a.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/7948779.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/zewelupiba_sebokilaf_fugobajegitevi_woxagelunezaf.pdfIn PDF document text
    • https://tivakuwisol.weebly.com/uploads/1/3/4/3/134315960/fukifurira.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/biwerop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377100/normal_5f8d374c3ab3a.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/75341e06-7ad5-4115-94cb-c53328da44e9/gijunalofokebosareji.pdfIn PDF document text
    • https://zegamidat.files.wordpress.com/2020/11/80409184914.pdfIn PDF document text
    • https://ramumawela.files.wordpress.com/2020/11/barbie_and_the_magic_of_pegasus_full_movie.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15a916b-bfad-49c3-89ca-f8095b123320/princess_in_training_meg_cabot.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_off000076cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CD 5524 bytes
SHA-256: c0f81f20dcbbd9848872b4b3a5adb4144caacd941b0aa68bfad3c690b4f4710e
font_01_sfnt_off00008984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8984 10592 bytes
SHA-256: 11e22818b37c8595186a2e31d60de9cf212ef4ae555714637910e9200386020a

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