Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10df0d72401ae8a…

MALICIOUS

PDF

46.2 KB Created: 2020-11-06 08:12:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 45a43a1a1eb84f1c6ef7368c9e2d348f SHA-1: 168a2df51cb71163e4e81926e9f95873c18620ca SHA-256: e10df0d72401ae8a4aa6cdca0e55d2cb8363a0b4460769e6010d3656943a79bf
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://trafffi.ru/strik?keyword=wowhead+bfa+alchemy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367294/normal_5f89a8a4edb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408992/normal_5f994ae48fd56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5f938f64350bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8d2b511fd1d.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/6761699.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f8a7b2450161.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/xexomemetewolo.pdfIn PDF document text
    • https://foxagizak.weebly.com/uploads/1/3/4/3/134332010/faguvirofuf_belarajut_xijekopabiba_sixise.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/turexir.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/dinakozipe-sosupidop.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/88d4d08d-cf14-4a90-9726-f1269ea6730e/40265530756.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/aqeedah_al_wasitiyyah_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608dc58d-f893-4bc5-800b-bfe1e753e3f8/81205366398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9126fb5c-463a-4280-9f3f-c5f76225379e/73333292888.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_off00007436.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7436 5508 bytes
SHA-256: 77bc3f6233b5e1e9b0b6feb91a768b129e8485211e38be6852fdf20eef562b62
font_01_sfnt_off000086f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F3 11276 bytes
SHA-256: 52d7a1963cee7131383e62869bd5f2221d07000ffa6ff4fd74ea7cbb758c90b8

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