Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d54e5df41c86058…

MALICIOUS

PDF

48.0 KB Created: 2020-11-05 13:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 27da5db72c16f5189753b830da594aae SHA-1: a5121f335845fbc183a41a87cf46dc98b4af7daa SHA-256: 5d54e5df41c86058cf5b00196028262235cfdd58b49843a84e8a1d2410b3ee9b
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://cctraff.ru/aws?keyword=pump+up+the+jam+lyrics In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f8c5f67b6cc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5f907408aa184.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464709/normal_5fa208ad0c379.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/3489881.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/paxaze-musiruzulimovu.pdfIn PDF document text
    • https://nonexivibofopuv.weebly.com/uploads/1/3/4/6/134603010/c488720f8169d47.pdfIn PDF document text
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/724488.pdfIn PDF document text
    • https://bewupoterefi.weebly.com/uploads/1/3/1/3/131380107/pexivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392452/normal_5f9e8ad8ea0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5f8ac1373ee31.pdfIn PDF document text
    • https://reregixezoxo.weebly.com/uploads/1/3/4/4/134461721/2987279.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/bafanudufijovawuwigeze.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/how_to_choose_multiple_files_on_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9331/9068/files/fluke_115_true_rms_multimeter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/bsc_magazine.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7B 5016 bytes
SHA-256: 33a8853dc5d2d325f08388921f0823d6788a64ad8099acd53ca77a7fa2443dbb
font_01_sfnt_off00006e87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E87 2128 bytes
SHA-256: 994e7822b1fb56bffb26d437483d35b95203e491f59001fb2ca858f515f03ea0
font_02_sfnt_off00007857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7857 13644 bytes
SHA-256: cb09daf481020877c732c37c1a9bd8d3b8f25df6ab62149a9753abfe489be8ef
font_03_sfnt_off0000a2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA2E7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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