Malicious PDF — malware analysis report

Static analysis result for SHA-256 235e086f3b8d60d1…

MALICIOUS

PDF

43.0 KB Created: 2020-11-08 04:28:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 345bd81a763255800e3db5fa37d4703b SHA-1: 8973fecfd698ab1940e2986d3f32625a2dda3250 SHA-256: 235e086f3b8d60d1491098adb32f0996eb3ba481449ea027ebe702515633329e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One prominent URL, 'https://traffset.ru/123?keyword=sample+palanca+letter+for+niece', is directly embedded in the document body, indicating a potential phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious.

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=sample+palanca+letter+for+niece PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416666/normal_5fa71a3a8285b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f8af66052ad6.pdfIn PDF document text
    • https://zojajodasu.weebly.com/uploads/1/3/4/3/134354616/64116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388163/normal_5fa5d6749e0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_5f9aea20defad.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/fdce884c9c9f2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f8f5b3de7dfd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/50939477702.pdfIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/91115782662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba774c59-9634-4f1c-ad83-0593732f008a/resirojagibedetur.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/hope_property_management.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/amate_bark_painting_art_lesson.pdfIn PDF document text
    • https://nofagixonuva.files.wordpress.com/2020/11/common_core_math_worksheets_for_6th_grade.pdfIn PDF document text
    • https://kuvusetile.files.wordpress.com/2020/11/uber_case_study_marketing.pdfIn PDF document text
    • https://mobijogif.files.wordpress.com/2020/11/51908044255.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_off00006bd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD8 5084 bytes
SHA-256: bfb7c496b04d58bc7a8cefb43c52ddff719f3e747d16089e189a053dd100801f
font_01_sfnt_off00007d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 9912 bytes
SHA-256: de542f3cc15819fa9ab9dd30c0aa3ec3459bafeaef172ff1f1243d83923860ea

Open this report in the interactive analyzer, or submit your own file for analysis.