Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec12c450317831b…

MALICIOUS

PDF

59.5 KB Created: 2020-11-07 00:38:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 6aa0462f1cb12d45a632136d46c5c7ca SHA-1: 3805472486a84bf31648abb02c9d81c704c8a9f4 SHA-256: 4ec12c450317831bfc264cb9d6c3c427fb3433de77eecc807cb577493f93d605
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=leon+muscles+campbell PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366965/normal_5f874a9cc7ba5.pdfIn PDF document text
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/27a098f0a370.pdfIn PDF document text
    • https://dogamoduxex.weebly.com/uploads/1/3/4/4/134481485/ce4dfa888c86945.pdfIn PDF document text
    • https://gowiwoniba.weebly.com/uploads/1/3/1/8/131857243/31ee6.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/turexir.pdfIn PDF document text
    • https://pegebitejujag.weebly.com/uploads/1/3/4/4/134445458/xawovomiwamiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_5fa17fabf207d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_5f9aca5980411.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://ferinojonaza.files.wordpress.com/2020/11/70601037384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45494249-c583-476e-b937-1cfaee59ff42/26679702557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76481f01-d4d3-4b04-b6c7-5ee04d3bce77/suwiputokagetaxijiru.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000b05a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB05A 20784 bytes
SHA-256: 62af14dc07b729696dd9f8bb4975bbbebc8f61fc7c42e5d368d8b2e418893fe5
font_00_sfnt_off00007b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B54 4820 bytes
SHA-256: 5e441f50323f7a06c2ad1a6ed01c64031e0e1bc706ed4f7a7cf352b0a1c563f1
font_01_sfnt_off00008b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 10720 bytes
SHA-256: a6790f7d111bca1a891173a66be7564c38d1cdacfd4ab577d130ee19ad13a341
font_03_sfnt_off0000d31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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