Malicious PDF — malware analysis report

Static analysis result for SHA-256 d57054ab61290a26…

MALICIOUS

PDF

42.5 KB Created: 2020-11-05 20:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e20c6e4dc703700bb3ee06bf803dd78a SHA-1: d4de776b5baaee1f35824651a56fa952fdd8c9cb SHA-256: d57054ab61290a26bc731d4306c1c8b788356d2529405ab2170969329b7f59a3
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=habeas+viscus+pdf In PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/4455014.pdfIn PDF document text
    • https://lafuworopiraw.weebly.com/uploads/1/3/4/3/134341657/watumobudi.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/xajosefobirow-kekefogobezuz-tisuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426558/normal_5f9de257a46ce.pdfIn PDF document text
    • https://xerutofen.weebly.com/uploads/1/3/4/5/134578778/b75de8.pdfIn PDF document text
    • https://bakukumi.weebly.com/uploads/1/3/4/4/134437371/6362104.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/migemob.pdfIn PDF document text
    • https://pozanabuloga.weebly.com/uploads/1/3/4/3/134366917/677ab96575da47e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_5f9bc97373a10.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/toliwudalamem/how_do_solid_air_fresheners_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3831/3128/files/piuria_esteril_causas.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_off000068f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F8 5184 bytes
SHA-256: 3487e8c0af05b3ddfe63f3d3fd1b0e39b1ea5dace99a4230f0d5b39511b0539b
font_01_sfnt_off00007ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB0 10356 bytes
SHA-256: 64fa04f3ff44700d3db8a80e359ac0a30bba72097d1f8783c7f90c86361c2a8e