Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f93f6676b04c28…

MALICIOUS

PDF

44.5 KB Created: 2020-11-08 10:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 09394eea781efb7bffa551754fecaa97 SHA-1: d6aa24584d0dc3c71673c0b3ea7cf391c01f7592 SHA-256: a0f93f6676b04c28507ebead339ce00ff77406be3738a8d5b28583360a287ad7
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffmen.ru/aws?keyword=miller+living+in+the+environment+pdf In PDF document text
    • https://ruwitopiramowu.weebly.com/uploads/1/3/4/3/134364975/9642447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374177/normal_5f9ca31ae914b.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/fovurefuvelado.pdfIn PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/baviwunenofifetiruba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421333/normal_5fa72990689a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445341/normal_5fa724eec5ae2.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/1f897a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_5f9b8924a86a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f9c247ad95a6.pdfIn PDF document text
    • https://dixitelenamipum.weebly.com/uploads/1/3/4/3/134380202/jimavip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/47a1cb6d-3969-4742-bc77-c59457daa943/90656194228.pdfIn PDF document text
    • https://vojutone.files.wordpress.com/2020/11/tozuwukes.pdfIn PDF document text
    • https://pexabubexofo.files.wordpress.com/2020/11/environmental_science_for_ap_textboo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3ab32a-e95e-4188-8b6e-26d0fd309914/47280288263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36366e4-beec-424d-9f51-b26d7a6f0fca/44974559146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac9d3f9-4306-4e08-94ca-ac67c4a1f0cb/6435635296.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 4920 bytes
SHA-256: 805c828fc29d24362ac0ea284e153f6373e4e3953bc3a1deae0f290e88976c11
font_01_sfnt_off00007466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7466 9928 bytes
SHA-256: ee78ac975be206fbafb997d0172c8ce12ee6167b4a5b9a8a8464e2ffc57f4bea
font_02_sfnt_off00009662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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