Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41371ba6951c293…

MALICIOUS

PDF

40.9 KB Created: 2020-10-09 19:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a63e13ce2fe1fb4005e4d22ee7d2aab SHA-1: 21cc0bc9ad99f9da4c27aedc55eed1fe41017cff SHA-256: b41371ba6951c293348246a992e6744cf121e29cfd98f87c661fd9f3f91785c5
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://cctraff.ru/strik?keyword=what+is+saltatory+ontogeny In PDF document text
    • http://fuzusu.liliaperez.com/uploads/1/3/1/3/131398440/7842318.pdfIn PDF document text
    • http://pasavusik.temperamentsart.com/uploads/1/3/1/3/131381088/2717696.pdfIn PDF document text
    • http://files.pocketfulproductions.com/uploads/1/3/1/4/131407299/lulakimoviv.pdfIn PDF document text
    • http://duworixar.risers4u.com/uploads/1/3/1/0/131070765/2715578.pdfIn PDF document text
    • https://site-1040224.mozfiles.com/files/1040224/53322177870.pdfIn PDF document text
    • https://site-1048449.mozfiles.com/files/1048449/wesutunimuluteporid.pdfIn PDF document text
    • https://site-1040373.mozfiles.com/files/1040373/98800266901.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2230/3399/files/damon_brand_servitors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8696/1045/files/sports_business_daily_global.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7820/0743/files/67652974275.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7ec066-f95d-4fa5-9cfa-f59cb430398c/69006551386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67213ac3-a2f5-42b7-9155-3e896940c23e/9901250876.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daabc7a2-e79b-4254-88ed-aa03fa9e834f/womuxedole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4204df19-22c7-416f-a0ff-9ea31471184a/31702633815.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_off0000632d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 5060 bytes
SHA-256: a15b42781bbc4f3446760ce7cbc025b9b3a27ddd4499169801b98ce5a25aef9c
font_01_sfnt_off00007472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7472 10072 bytes
SHA-256: 07b68d80fa503142305d5de46bdc24cb7581a5474d8560d95bf730d1277705fe

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