Malicious PDF — malware analysis report

Static analysis result for SHA-256 acd86a9bcaf85eaa…

MALICIOUS

PDF

49.9 KB Created: 2020-11-09 04:18:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 26b1f67fe2847cf62c43cfccae96618a SHA-1: f61efad0bb6604fb04ccbc5e00028ef6197c9981 SHA-256: acd86a9bcaf85eaae7190fa0178262b8b3e67293b5fe5ee69beaf1125b78b201
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ggtraff.ru/123?keyword=maroon+5+songs+2016 In PDF document text
    • https://punuvenow.weebly.com/uploads/1/3/4/4/134445800/812cd74c7944.pdfIn PDF document text
    • https://rirejanumaxix.weebly.com/uploads/1/3/4/6/134631236/taresavudewubij-dafatubepu.pdfIn PDF document text
    • https://dumejolizaxoko.weebly.com/uploads/1/3/0/8/130814858/c4d6f7cf.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/4927124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f872e7505803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f9a55b39d35d.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://riroxoposej.files.wordpress.com/2020/11/calendario_mensual_2020_para_imprimir.pdfIn PDF document text
    • https://xumozaguk.files.wordpress.com/2020/11/zonogodizofawusevog.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/vegadopemejebuk.pdfIn PDF document text
    • https://fiduzafitas.files.wordpress.com/2020/11/31053423367.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/36880084032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a28d58-7247-461a-9c6a-0fab829526db/siruxejomelobajuboxik.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7315 4972 bytes
SHA-256: 479aa57e2e1a6a2c246f1ff6e920973a0f7d0aa853e91b8892ac85dbf79ebe6c
font_01_sfnt_off000083f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F4 12608 bytes
SHA-256: 3326fc764c2a9cfb270c4eac50f7d9787ffad719b6985bae23697ddf8b5fefab
font_02_sfnt_off0000ab70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB70 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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