Malicious PDF — malware analysis report

Static analysis result for SHA-256 36e397e5e09efaff…

MALICIOUS

PDF

61.2 KB Created: 2020-11-07 07:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 47b80a7f53920b5d44a058e2f2e530f6 SHA-1: 25dfa2211041bd0440e7fce40ac7627d23456967 SHA-256: 36e397e5e09efaffe923ad9499e13bcfe0c8037808aeef95f239f8d3313e3c91
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=bdo+valk+guide+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f98543dbf9a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408463/normal_5f9f0ab22ea5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5f9f9084eac1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f98a0f0bab84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f92ebaa806cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375518/normal_5f8e47c8d31d8.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/ed07661c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f89d00b90438.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/2057b6d0-6554-4554-8896-d7feaca7b244/engineering_mechanics_statics_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/39511689480.pdfIn PDF document text
    • https://rotadenig.files.wordpress.com/2020/11/82236523173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1846137-31ff-43bb-aa48-344533c77037/39265591990.pdfIn PDF document text
    • https://kutoxuzute.files.wordpress.com/2020/11/nifedezogutetasumeserav.pdfIn PDF document text
    • https://tafexoru.files.wordpress.com/2020/11/3294531957.pdfIn PDF document text
    • https://romekelisefo.files.wordpress.com/2020/11/nitunawikudaremutujozudok.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_off0000b048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB048 5376 bytes
SHA-256: a9abd0f63a8aa6f375fe5c043d1bd74404d68341b5d2210a0f7c957a52e03075
font_01_sfnt_off0000c2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B6 10868 bytes
SHA-256: 3679d5ed92799b173b67fb72ecc284801e10afc1ba5e6b0dca13115424cb34f5

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