Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1a6c53f5c8a8a90…

MALICIOUS

PDF

40.3 KB Created: 2020-11-09 00:51:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 465f8c352bff46f1b1ef9d2a7d1440f4 SHA-1: 856491a34f6e1266d9e70fb5869478e38f410896 SHA-256: e1a6c53f5c8a8a9064ae67e5da0308aab35cd0a969fb0776a57beec382f4eda8
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://traffset.ru/wb?keyword=newt%20quotes%20from%20the%20maze%20runner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f93cfc897d27.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/e1490f30-d4ee-4fd9-b42c-0af3f0ddd536/46535635106.pdfIn PDF document text
    • https://supigakesev.files.wordpress.com/2020/11/25358168196.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://bujidafowe.files.wordpress.com/2020/11/xudujeganokuwolefutepov.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/682deebc-bb09-42b1-be2f-9feb1929566d/18201609656.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97b5c3d0-4e61-42fb-8147-fd013d8be383/nukobabuzuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fece63f1-5799-4c90-ba02-aeb292cb7920/garodufuwutibirup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934e2e26-b8d2-4445-92a1-f601d6798777/35689778437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/379ee116-10e9-43eb-ad92-e62b0f941688/72275556285.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba446128-16a3-43a5-9714-d59ec30d621f/the_complete_history_of_jack_the_ripper.pdfIn PDF document text
    • https://milosozefij.files.wordpress.com/2020/11/acr_form_for_contract_employees_education_department.pdfIn PDF document text
    • https://fimalul.files.wordpress.com/2020/11/xenikefeg.pdfIn PDF document text
    • https://fudatagito.files.wordpress.com/2020/11/sper_mario_bros_oyna_atari.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_off00006009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6009 5212 bytes
SHA-256: 6bc6a640fd71d8d72e0e5604f8e4073b055502315b1cd4d4d67bff5d63e54363
font_01_sfnt_off000071c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C1 10304 bytes
SHA-256: 69e780e5fdd32102665217ad04961b72845c965f928b3d87279321f6483dbdc3

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