Malicious PDF — malware analysis report

Static analysis result for SHA-256 f044396fcf31d668…

MALICIOUS

PDF

37.0 KB Created: 2020-11-08 10:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 8dac05b20cc87acaaf6200a04c07676d SHA-1: 4f016c30e3e3e88869d72bc612cfba802cc26507 SHA-256: f044396fcf31d668272bbdf65305e890f3c3b8ee9803e20dd0f9383f0e6de5b9
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://traffine.ru/123?keyword=uss+dauntless+nx-01-a In PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/busubamolujoxuduwaxe.pdfIn PDF document text
    • https://nulejekenafu.weebly.com/uploads/1/3/4/3/134367691/jerudisidivu.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/073762be6.pdfIn PDF document text
    • https://luleloneluso.weebly.com/uploads/1/3/4/4/134450102/6557875.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/5515853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404105/normal_5fa3c927641fa.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/3703292.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/18ad995.pdfIn PDF document text
    • https://misaxokur.weebly.com/uploads/1/3/4/3/134354007/tutiganajibesiv.pdfIn PDF document text
    • https://melegejisud.weebly.com/uploads/1/3/1/3/131379421/28d9810e9.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/d8993fc3-1eb7-4abe-aa5f-568941fd3de4/43689453660.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73220c21-4ef6-4c15-8875-548a18921a8b/the_lowland_jhumpa_lahiri_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5c5f70-35f1-40b5-ba35-b724684ab5fd/29508624332.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_off0000537f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x537F 5008 bytes
SHA-256: 9ed3af98c3022d490a09a665e08ef20143882fe5f296b68f627e0e133a766285
font_01_sfnt_off000064ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64AE 10204 bytes
SHA-256: fad4d4fc460135926b4dd7712510f4a5f513e722390187eea7e3157cddeb56ff

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