Malicious PDF — malware analysis report

Static analysis result for SHA-256 0205713074a48c7c…

MALICIOUS

PDF

39.8 KB Created: 2020-11-06 17:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b79b295a7c91c3a0f5c25e4367814d07 SHA-1: 13a6776f9964096b7ba01ac3cb52a0807c90d455 SHA-256: 0205713074a48c7c865c5975d732b72ac5f8048844613f213929dabb45a7c410
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=movies4u+vison+1080p PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f950a07e8cd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5fa410df3af5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5f8f57ad5e900.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bipajus.files.wordpress.com/2020/11/22181807743.pdfIn PDF document text
    • https://ripigewub.files.wordpress.com/2020/11/vukafunewebilovojut.pdfIn PDF document text
    • https://gezovuxa.files.wordpress.com/2020/11/49165319915.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/vibinofa.pdfIn PDF document text
    • https://butizimi.files.wordpress.com/2020/11/24974641175.pdfIn PDF document text
    • https://monusiz.files.wordpress.com/2020/11/esl_pre-intermediate_reading_texts.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/nijemusejewuwejox.pdfIn PDF document text
    • https://nudekix.files.wordpress.com/2020/11/akuma_rage_art.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/44652218246.pdfIn PDF document text
    • https://sufuvuse.files.wordpress.com/2020/11/3074016501.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_off00005f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F41 5016 bytes
SHA-256: c5fdec294da4f8b75a637af987a0e5cb34e3a6b7f92aaccb7b82be15eb34cd9d
font_01_sfnt_off0000708c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708C 10080 bytes
SHA-256: 0c40a06d04e8ba426f93d63ff206be7942e95ad653f1757eb1f3c5e826a8274c