Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f7688a2fe93994…

MALICIOUS

PDF

39.8 KB Created: 2020-10-30 17:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 46b2d7cb5a6771fa33c0befe2513ac6f SHA-1: 8b1c65bb57734eaa65324414c27e91438522fa2b SHA-256: 61f7688a2fe939946218e20966530f4ad36ef8cac66d64772d9de03e7f082437
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, identified as a link farm, with one link pointing to known malicious redirector infrastructure. The document's primary purpose appears to be directing users to potentially harmful websites, possibly for SEO manipulation or further malware distribution. No scripts were extracted, but the presence of numerous links suggests an attempt to exploit user interaction.

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://cctraff.ru/wb?keyword=walking%20on%20water%20madeleine%20l In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369908/normal_5f9a68317c4b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f96e56ed4c0c.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/434c403aad55.pdfIn PDF document text
    • https://rulafusojuxibaw.weebly.com/uploads/1/3/4/2/134265871/6213063.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f8c2b33edebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_5f9a1b57155ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5f986530b7941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383681/normal_5f9b94e6d7053.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/9a290402-8852-4532-8b92-c803172900e2/loboxazakemabibijawebufo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23807044-a4ca-46e6-bcfa-7a7fb019d490/skeeter_boat_center_used_boats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a8a8845-64b8-42e8-8864-daccfca0cd6c/1913683572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79a164d2-6427-424c-9faf-770867015c0a/psicologia_del_exito_mario_luna_descargar.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_off00005c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 5384 bytes
SHA-256: 4be2df4c0ef58d8aadcb5699fe87d82e2e508bb45e1767e114e348b2ae6d192c
font_01_sfnt_off00006ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE4 10896 bytes
SHA-256: 3a6ca32173f8cc4cbcb97e57f07a4a1ab4bb0b610c5108d66e602f7e3f660d49

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