Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a8e7d8cae3cbfd…

MALICIOUS

PDF

50.7 KB Created: 2020-10-15 10:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8dbbb89cca92324bdd080f277e7a7b59 SHA-1: 5a9407c70f3b228d8d0791c9054442c14dccd81b SHA-256: e7a8e7d8cae3cbfd2552295da3e61601059a2ca4b2abb75301065631795302a9
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=how+to+get+voicemail+icon+on+android In PDF document text
    • https://site-1037882.mozfiles.com/files/1037882/85656028183.pdfIn PDF document text
    • https://site-1039779.mozfiles.com/files/1039779/jikobijunipopikiwelexel.pdfIn PDF document text
    • https://site-1038898.mozfiles.com/files/1038898/mumor.pdfIn PDF document text
    • https://site-1043934.mozfiles.com/files/1043934/contrapunto_musical_especies.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/pelorabagojimolopeg.pdfIn PDF document text
    • https://site-1044185.mozfiles.com/files/1044185/59287174537.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5f873c1bef7da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f8787329768e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8757b0afe75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f873efa94aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f8701ede58e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369788/normal_5f87e98a30ff1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f873e2bcabfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87a185733dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366302/normal_5f87df613d67e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f872b4ed0a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f879f33bab28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6676357-db99-4fd7-bf3f-80ce663cb4a9/sibufovugobuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59a797b1-1fd3-4703-929f-d7112d55b786/nireguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6acc595-d060-46b7-a459-3ea99b0016a8/fexitapubowufitenipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/688172a3-6375-405a-a57f-98bd64719645/62575751401.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_off0000895e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 5192 bytes
SHA-256: 4a0dc3249a7b152e00fe2a6955d3b98be6c2e34479d12eafa2bca219e13e829d
font_01_sfnt_off00009b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B04 10128 bytes
SHA-256: 1c6c43f83e8ce9aa694c756182b41f432dd81830416f9c5ca90df4a9487300fa

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