Malicious PDF — malware analysis report

Static analysis result for SHA-256 566563a4cb941733…

MALICIOUS

PDF

71.4 KB Created: 2021-03-20 00:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0c126381078b5f95faaae7e255efe2fd SHA-1: da2992480a9671e13b80ea1d30bbdf00cda8d23e SHA-256: 566563a4cb94173399bea1b7c789467989fd113668aea738b859db82052f416e
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 0.9996

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://xajibur.ru/123?utm_term=chitika+meda+chitika+vesara+naa+song PDF link annotation
    • http://hhizmet.com/castellan_fisicoquimica_solucionariozratw.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/eq9s7VO/carriage_house_garage_doors_swing_out.pdfIn PDF document text
    • http://m-laskin.ru/68075807668e3ava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375095/normal_5ffeed3518475.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/dgihcZk/exploration_peak_park_weather.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/cHrAE7l/zisajujifeluxatiketola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_604a3f2c0eeda.pdfIn PDF document text
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/bigasavaxagolatisow.pdfIn PDF document text
    • https://jirorenuges.weebly.com/uploads/1/3/0/8/130874518/vavaruvudixuzo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495696/normal_5ff309e9ae6cf.pdfIn PDF document text
    • http://fridgeservice.ru/gopro_hero_4_silver_specs_4kftgmw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487399/normal_5ff7fbc5ed706.pdfIn PDF document text
    • http://opros.xyz/curso_marketing_digital_e-learning5qib5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420747/normal_605524cf6bd06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405194/normal_60442a3004145.pdfIn PDF document text
    • https://kaxamutibe.weebly.com/uploads/1/3/5/3/135348628/aed12d0928.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413978/normal_5fcbf811baacc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444115/normal_5fe9b7f10b686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd1617bb00af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_9eb8ccecc9d94d948de155c5475ae92a.pdf?index=trueIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_a4d262c74271484597ace2382c125256.pdf?index=trueIn PDF document text
    • https://e4dd5bf8-bd13-43e3-b37b-9624b2564f03.filesusr.com/ugd/093416_4c1bf626c4994069bb1395f78d38809a.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D7 5348 bytes
SHA-256: c8a24dca008190b8b4feca685936e7fff4a1f9aa2e545c1ceaab8acc6f7d0894
font_01_sfnt_off0000ebda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDA 10708 bytes
SHA-256: a861e8592058714f57d5ec7af4ca5cf489bfaf280800f6b880986b49449c2582

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