Malicious PDF — malware analysis report

Static analysis result for SHA-256 47763d79082deb31…

MALICIOUS

PDF

40.4 KB Created: 2020-11-08 08:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 53cf8175884ece5fb6549cc23f358920 SHA-1: e8d654b3ba88ff6625f1438630edf3b8af1fb130 SHA-256: 47763d79082deb31ac8ddde0a9318de1935900c46303732f0945b69bc964a3d0
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=civil%20war%20advantages%20and%20disadvantages%20chart PDF link annotation
    • https://domuzowejiro.weebly.com/uploads/1/3/4/3/134360268/d73505eb0d693b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5f909d5006ef9.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/7d79f4c.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/6ec62.pdfIn PDF document text
    • https://defagetomorig.weebly.com/uploads/1/3/4/5/134576552/1013756.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/jokerekokeb.pdfIn PDF document text
    • https://vamewufu.weebly.com/uploads/1/3/4/3/134317042/senopazaj.pdfIn PDF document text
    • https://tejovobomogopiz.weebly.com/uploads/1/3/4/6/134626725/guvegutum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fa5d1f6ccabd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391624/normal_5fa19655dfcbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_5f94dabbd6f8f.pdfIn PDF document text
    • https://duxuremi.weebly.com/uploads/1/3/4/6/134623812/zikizurutofedekixeri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wulezem.files.wordpress.com/2020/11/ripepaw.pdfIn PDF document text
    • https://jesulukon.files.wordpress.com/2020/11/7110098246.pdfIn PDF document text
    • https://nolelefe.files.wordpress.com/2020/11/28600291170.pdfIn PDF document text
    • https://sidulemova.files.wordpress.com/2020/11/tojakabozemoxujinalagave.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_off00005de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE3 5256 bytes
SHA-256: 9264904a1a79ce8d81684e8c82eac2a3e1ad4cc52e3c2a3ee55d45befd22f38e
font_01_sfnt_off00006fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 10712 bytes
SHA-256: 3cd397baf2aac09506174635868a7a7e555f44d6bc970521d5bee430e005da32

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