Malicious PDF — malware analysis report

Static analysis result for SHA-256 780fffe4ec58d08c…

MALICIOUS

PDF

36.3 KB Created: 2020-11-06 23:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: e3b40c3915f8ab364e2a3c93a4bf2868 SHA-1: 5d6fb6cf76bbd0c3419c7b9b26e2014f4997dd29 SHA-256: 780fffe4ec58d08cdabf74dc65c72cc24b3d553219bdc4e89002888cfcb700aa
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=ninja+cat+games+unblocked PDF link annotation
    • https://firedisivimi.weebly.com/uploads/1/3/0/9/130969818/3511835.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/mekagosilom-rezobapejowuvi-juxofu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_5fa0f98ac444d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_5f97e00c045c5.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/geguzemu-zuset-vabikix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5f93ccc670988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f8827b72a9ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377388/normal_5f8b31171b527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f88a9aca4649.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/0794418d-c248-4f01-bede-8e028200e0d4/angular_template_if_else_statement.pdfIn PDF document text
    • https://wemusow.files.wordpress.com/2020/11/78507604737.pdfIn PDF document text
    • https://mibejadefoxo.files.wordpress.com/2020/11/osr_jpg_jpeg_png.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.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_off00005067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5067 5412 bytes
SHA-256: 480334a2ccf757d706973c31dea014e24978a0ff11cf09fa06325cbb8f6cc168
font_01_sfnt_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 10020 bytes
SHA-256: c91aabc184bd48148251a6f4504581dac3f6ba8b978e7d5eafb4f55fe34baa63