Malicious PDF — malware analysis report

Static analysis result for SHA-256 81356d59ed9472e9…

MALICIOUS

PDF

38.6 KB Created: 2020-11-05 10:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9201850ebbb012cc5fc5b907d5921907 SHA-1: d767bd413a102a746ae02ee270d45644cc1246e9 SHA-256: 81356d59ed9472e9f03ab73f98cb020faa8af211a134f5bf5bc9161c09acd2fa
94 Risk Score

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=modded+zone+xbox+one+pdf In PDF document text
    • https://lifagixuwemup.weebly.com/uploads/1/3/0/9/130969738/nareselij.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279107.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/penodiw-tiregolugu-vafas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fasanag/feed_conversion_ratio_broiler_chicken.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/auto_clicker_apk_for_amazon_kindle_fire.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/muzafeserenise.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/82436199240.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/first_congressional_church_id.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4813/9414/files/words_beginning_with_home.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/caccia_al_tesoro_nell_universo.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_off00005714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5714 4784 bytes
SHA-256: 8d58d4677c3af2214b4c48818975e7b6a1a7878cb57ae0e16be5a55dcb4b6857
font_01_sfnt_off0000678a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678A 11184 bytes
SHA-256: d1778f8cffcd9106df1e681b6ccde40ff0f35e56012ffdcba70ea0ab64f898b4

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