Malicious PDF — malware analysis report

Static analysis result for SHA-256 b822d35b6939459a…

MALICIOUS

PDF

62.6 KB Created: 2020-11-06 15:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 591f2b416818b32ba87c2fd76f9dc508 SHA-1: 7975387a6158a6a75f0a873ec0a5f7a63551f553 SHA-256: b822d35b6939459a0aa20b0fc7b9679f9ced6677774f4025ce464f2d7525dd11
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=new+haven+unified+school+district+calendar PDF link annotation
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/1588161.pdfIn PDF document text
    • https://zodovamerevi.weebly.com/uploads/1/3/4/3/134316438/sozeb_suvurivegonirek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f94a137534a3.pdfIn PDF document text
    • https://mezuminekafowiw.weebly.com/uploads/1/3/4/3/134346911/nadixe-kegodomoniguni-remibabab.pdfIn PDF document text
    • https://rikinosi.weebly.com/uploads/1/3/4/3/134352476/d20ad624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_5fa18d198c322.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/1206243.pdfIn PDF document text
    • https://mivoxoxez.weebly.com/uploads/1/3/4/3/134340481/rizudes_gopuweturozo_gixuk.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/5d0cd671-0c49-473c-8a2b-3c93b690477c/fakuvofajirojolixalem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5311bc5-84d2-4574-9f5b-2f67baecf408/79615234356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f420462-c5ec-4ec6-8122-cb29cba89e8b/18121753852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b86547a5-500c-447e-afe4-a008c7e9e426/tizusufemikibadijesanir.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_off0000b76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB76B 5232 bytes
SHA-256: 2c90788ffa217396aeeb1ed16c9d999d19f739c0042271cb72fb2878bfb7713a
font_01_sfnt_off0000c951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC951 10560 bytes
SHA-256: c0c6ec26fd35f4dceeba335b59bdaa85765509f30e6cae6bcc873dcda094f206

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