Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ac78eb2d307e7b…

MALICIOUS

PDF

89.7 KB Created: 2020-12-29 17:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 02206653d8bdda1c1eb88648f9648048 SHA-1: 18b47dd2140ac30e4823417b3883f07715c30b61 SHA-256: c7ac78eb2d307e7b35f257687b1943ee2e46f2e5ea232942e9c57c5268577bd3
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=australian%20air%20traffic%20control%20jobs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fb8f582d3b78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475559/normal_5fbfea12420fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fce5bc11afdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5fb6c82ac1cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409250/normal_5f98ec9514ffe.pdfIn PDF document text
    • https://nanufuso.weebly.com/uploads/1/3/4/4/134443711/malurux-nisuze-zufagawewonuje-sidonu.pdfIn PDF document text
    • https://zizuralozirufu.weebly.com/uploads/1/3/1/4/131483034/258d59bfeca.pdfIn PDF document text
    • https://lanudoda.weebly.com/uploads/1/3/2/3/132303217/da9101.pdfIn PDF document text
    • https://razezoxuwen.weebly.com/uploads/1/3/1/4/131453099/popegefov-robet-tifafovivikeju-gunowetugur.pdfIn PDF document text
    • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/tutizakozetelikoza.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/0e5e807d-9b79-4772-b7fa-8dab07dda416/numerical_mathematics_and_computing_7th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf6ab7c-ef2b-4113-ab42-8750f23f1136/edison_driving_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb193fa1-e197-4c18-855f-e39b764ed68a/superflex_curriculum.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/93664256980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d34dc3-7a29-4573-b120-c5b398629047/segizapalax.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_off0001240b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1240B 5080 bytes
SHA-256: 08e01da8e82d8ed32605e287d616a27f5d0cea1aca0720da35e041fca89b374c
font_01_sfnt_off00013565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13565 10728 bytes
SHA-256: e0a7c81e5c9f67b20bae45904e47eff65e214695f75be8ceb3ae74a8adfae90b

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