Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff98c2bfa5cc04bc…

MALICIOUS

PDF

41.7 KB Created: 2020-11-08 15:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 833941e3cb430ff543e790267f97cdde SHA-1: 219a22f77231151359a3e8fc105c14fe3cc87433 SHA-256: ff98c2bfa5cc04bcbd9d3f83a17d31eb9559b9ccb40cbaecb52e6d42f95477d4
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/aws?keyword=unblock+video+website+proxy In PDF document text
    • https://zufopawel.weebly.com/uploads/1/3/4/4/134462865/19f8e.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/xopilewag-gijil-vopufedis-davuwejujiner.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405922/normal_5f9483261ac9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f970092af3e5.pdfIn PDF document text
    • https://vunatoja.weebly.com/uploads/1/3/0/7/130738644/dasepuril.pdfIn PDF document text
    • https://tinavabubopani.weebly.com/uploads/1/3/4/3/134317914/240155.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/tazanobawelugesusan.pdfIn PDF document text
    • https://gepagalegizexu.weebly.com/uploads/1/3/4/4/134478943/sepuminiritenugimixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/lepame.pdfIn PDF document text
    • https://kimidajitigu.files.wordpress.com/2020/11/misinibugizuzekasujezewi.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/soviranofuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/kewugolagotifetodino.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/93248756455.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_off00006472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6472 5376 bytes
SHA-256: 77cf57d51a729cec9d12014024ef5c954109d78e47ef8ce4c75eb296f83049e8
font_01_sfnt_off000076e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E6 10436 bytes
SHA-256: 186b1865971e32967096d7c731032984c995adca3316e45a48b00a90c79c3e3a

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