Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3de1a91dee4883f…

MALICIOUS

PDF

62.1 KB Created: 2020-11-03 22:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f0c787951520c16d4db20535e4c537e5 SHA-1: 32d2909f628fed183a86b24967e8120718f8ce30 SHA-256: c3de1a91dee4883f06e304ef82580b9be8f710f2bd225ab8fa4c2eeea2b34bfa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files, forming a link farm. One prominent link, 'https://ggtraff.ru/123?keyword=mega+man+x6+weaknesses+chart', is identified as a malicious redirector. The document's primary purpose appears to be directing users to potentially malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=mega+man+x6+weaknesses+chart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380068/normal_5fa1af7246e65.pdfIn PDF document text
    • https://vobemebu.weebly.com/uploads/1/3/4/3/134383317/8497133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f87bccbee7b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5f98398deeac1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384143/normal_5f9a119f992bb.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/1cf22.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/wilafifetijedo.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/f52a5d2b-a13a-4163-9074-fe97675f9a28/modern_warfare_prestige_rank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3be5e062-2df9-4c2e-afd7-0fee633955b6/the_mis-education_of_the_negro_study.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70848994-25a1-4a97-b28e-5196d54de65a/45990782798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20896386-0099-4680-9228-c172222f0055/chain_rule_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/google_drive_apk_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62822288-464e-4c29-949d-f0ceab23dfd7/midibaloxizodijozuzi.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_off0000b42d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB42D 5564 bytes
SHA-256: e7c35a0acbe8957fd04af9da24c9265083c315a69809b08c3340071e8bb4d03d
font_01_sfnt_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 10704 bytes
SHA-256: 4126ae3a1c63a253c3e7a97f80cf845761ea001d032ce26c2eb2abf53641132a

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