Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ddf21a1de0f091…

MALICIOUS

PDF

38.1 KB Created: 2020-11-08 03:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 109eab9d567ce6732b281eedbca0357f SHA-1: dc71a8ba72ceb66ee7ec3d8c49a744fcbb2f30cf SHA-256: e1ddf21a1de0f0916c728294b8d03604b8e2332dcfea6e623bbbae27b8833d0d
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafffe.ru/123?keyword=viking+stove+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fa2258c5e202.pdfIn PDF document text
    • https://xuguzopagar.weebly.com/uploads/1/3/4/4/134490213/wukakof.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/gedosimosivujojad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_5f8c43ed5408b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_5f94fbedbe509.pdfIn PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/8803450.pdfIn PDF document text
    • https://fewaxozane.weebly.com/uploads/1/3/4/3/134341296/gekaniwubigo.pdfIn PDF document text
    • https://duxevuwelinabim.weebly.com/uploads/1/3/4/3/134353564/kasazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wixisodek.files.wordpress.com/2020/11/algebra_2_chapter_7_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5627e13-09af-4e71-a8ba-391bdc5e698b/kusuxo.pdfIn PDF document text
    • https://dagirivemaj.files.wordpress.com/2020/11/mobile_home_purchase_agreement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b228d48-939f-4160-a984-feb53696932d/descargar_el_manuscrito_encontrado_en_accra.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_off00005531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5531 4996 bytes
SHA-256: aed87afd5335bde127b752ca05e41fb32c91fd90bdedb3cafd64a1c0c04c851d
font_01_sfnt_off00006632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6632 12424 bytes
SHA-256: 10d33e0268c355bb9617c8a5a55b26b60331431139d33144522b391f94533246

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