Malicious PDF — malware analysis report

Static analysis result for SHA-256 a393f9cacf9d25dd…

MALICIOUS

PDF

40.8 KB Created: 2020-11-07 19:05:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 033a844edf8918fab584e476d70fc428 SHA-1: 72d33b262bf590819720f6ef6626bb95a127de86 SHA-256: a393f9cacf9d25dd15a072b962af8ffd9cea59c2c9ce86eca9bdb8845d6ee0fb
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://trafficel.ru/123?keyword=app+store+words+for+life PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465390/normal_5fa26328a33f0.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/8154179.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/nokagetizafafuwixe.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/6544629.pdfIn PDF document text
    • https://jibametugo.weebly.com/uploads/1/3/4/4/134486067/xazigafajurixe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://dinevuwe.files.wordpress.com/2020/11/voxawizawugugimux.pdfIn PDF document text
    • https://zekalewuwodo.files.wordpress.com/2020/11/xonirodadam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b60969a-1ca4-481b-8d4f-10caefac20b6/xobitigisorezogef.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/95519257918.pdfIn PDF document text
    • https://kepajeji.files.wordpress.com/2020/11/nijogunedeluveritoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6d3ddf-66c0-4523-a13b-312cb4a295c5/72463258897.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/23685671370.pdfIn PDF document text
    • https://pufewureda.files.wordpress.com/2020/11/gikosozatajalomiginex.pdfIn PDF document text
    • https://wobonil.files.wordpress.com/2020/11/63729759713.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_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 4904 bytes
SHA-256: 125bb22c951928f59e27dea6d7971c8bc28f22832157613cd19066487e8d6258
font_01_sfnt_off00007363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7363 10328 bytes
SHA-256: b9aa490275d102d3850fbfdf798950cec4d22e73c0fef74a6c0f3bba498563e2