Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5e1be809bcb99d4…

MALICIOUS

PDF

43.6 KB Created: 2020-11-05 23:30:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ea2fa161f555ff718b20d5dd2c2f9d0b SHA-1: 0319a4c5b6fd085b321c8e4e466640fce319ac0f SHA-256: c5e1be809bcb99d4ab82001c30b3f367b2816793653158192625eb23a4f311ad
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/aws?keyword=chittenden+humane+society+dogs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5f8f4c476d7a7.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/magobopizopito-fedekuvajigin.pdfIn PDF document text
    • https://tuvexora.weebly.com/uploads/1/3/4/6/134618292/3534454.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/porukofosu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5f90a4da7b599.pdfIn PDF document text
    • https://woliwejimagevin.weebly.com/uploads/1/3/4/3/134319070/gobuked-nerenuruzu.pdfIn PDF document text
    • https://guzuzixud.weebly.com/uploads/1/3/4/3/134357052/845d7.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/29a35bf5-0d0f-408d-a1a1-80eb576b9efc/77863256996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf07e77-3335-49af-8485-13f1f08728c0/23017572600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/834a2f25-738c-45d4-bb66-ce7df00ceb30/54424989241.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/nivugadidizuxurowux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463f09db-dbea-48d3-aa6a-6e3e20de5967/xekapulasoramizexol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8b33c6c-fe57-4961-a20e-91214c147af2/36103329840.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/24348769119.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/82105132064.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75ea6ed-ee8f-4366-bd68-8eda374837f5/kigepolinoxuw.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_off00006991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6991 5232 bytes
SHA-256: 890c6a06b6bc7321caa15f1e50fd45504b7193ceee2dda735108dbb027d79023
font_01_sfnt_off00007b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3B 11052 bytes
SHA-256: b1cf5b02f06b6a37fba5cf581f110ed33fe6b207b5cfdb1da390d738e5034840

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