Malicious PDF — malware analysis report

Static analysis result for SHA-256 acc0de26d1349aef…

MALICIOUS

PDF

48.2 KB Created: 2020-11-03 19:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 03ada134d6e9d431cf6ebf3a3d33fb06 SHA-1: da0aff85377c9397db45c191b8d7fcdb5a9dbe13 SHA-256: acc0de26d1349aef15feefc7d458a325f7e412339c0e2ddbc3fb9756fbefb16a
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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/strik?keyword=stratolounger+recliner+dealers In PDF document text
    • https://suvibumaluri.weebly.com/uploads/1/3/4/4/134458401/dbf8f39af1b.pdfIn PDF document text
    • https://rawixokuboja.weebly.com/uploads/1/3/4/0/134097397/zewubex_jovoti_xovidizu_welunilijome.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5f9f6af1e4da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383678/normal_5f9095557ebce.pdfIn PDF document text
    • https://mesovozilepako.weebly.com/uploads/1/3/4/5/134588792/2632587.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/7c4b085c-a58e-4f4f-82cb-5534fa22683b/ironmaster_super_bench_pro_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c22d159d-00fc-4046-a894-a16aab150e1d/niwaxukebep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92f97a9c-0084-4d91-a16c-f7b9370e67cd/39325525017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fb8748-2613-423b-b46c-5cf06dd35bf0/porogegekurozokaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a12fd9-7130-43f7-84da-86e6d424a7b9/pitamobuvewotujujagubewu.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_off00007d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5B 5208 bytes
SHA-256: b1baa7352ad8e1744856cd9f404d5aa31c7d98cf25e224603da236897357fcce
font_01_sfnt_off00008f18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F18 10960 bytes
SHA-256: ae8e466cf75197a1bd7b2bee1d4a449d8a751570ec71e2aa1fb5dc7771f0fcff

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