Malicious PDF — malware analysis report

Static analysis result for SHA-256 164c1b48968203eb…

MALICIOUS

PDF

42.8 KB Created: 2020-10-01 18:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f7d1cb42f7c9b92a16e5a35296d33a86 SHA-1: f3dc0fa54ff60a1dedb5c0bb03323da86125d2e7 SHA-256: 164c1b48968203eb84a6144468160047cfbdf3223b28cb4cb2b2b5125783af15
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://cctraff.ru/strik?keyword=bridge+over+troubled+water+sheet+music+piano+pdf In PDF document text
    • http://files.morningmoontarot.com/uploads/1/3/1/3/131384436/vevatavedu-bolejususo-zixebumujonara-degux.pdfIn PDF document text
    • http://vapigupi.saintgregorysileby.org/uploads/1/3/1/3/131380934/kotebogisarisaf-folijoma-rojugizaj.pdfIn PDF document text
    • http://files.writerqayyimmckoy.com/uploads/1/3/1/3/131383380/98e6e0.pdfIn PDF document text
    • http://files.good-chi-fengshui.com/uploads/1/3/1/6/131606121/9993728.pdfIn PDF document text
    • http://files.niuchin.com/uploads/1/3/1/4/131453592/7049128.pdfIn PDF document text
    • http://files.stensolo.com/uploads/1/3/1/3/131380158/nurenekeparawekije.pdfIn PDF document text
    • http://files.juliepickeringequestrian.com/uploads/1/3/0/9/130969205/jigev_zelaboke.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/34899a47-bb0a-4442-aab1-87c831fe1e42/xonofunigukelanajejewexip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c278f68-912a-4da8-8f9f-8862fde3c6bf/lenukiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a265f9-1a7f-40bd-b434-e12b772f6e72/lovelebijukakalobot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ef7277-81ea-4f2b-8a1f-23ffaf402c89/biladi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecfa7a47-8662-4147-bdd9-d93c64fe11b9/xirepuvazitigosime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428bccec-6dea-47a7-93c9-4aeb8b030efd/rimowaloramekiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1168a15f-ff4d-42d7-a600-8d391ed74af8/33742469072.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3fecf6-8f89-4318-a04c-2d258b347765/32028025495.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_off00006721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6721 5912 bytes
SHA-256: 2056e3365b18a25521b1176fdf949ec5b7464550ca4692afade33da416b4932c
font_01_sfnt_off00007b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2D 10244 bytes
SHA-256: 64beec0f6750cd9c18e079f3521e038195e22d492c1b1f51084be4b711e88d20

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