PDF malware analysis — malicious · 994d79f5321dae66

MALICIOUS

PDF

41.7 KB Created: 2020-11-07 07:49:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23

MD5: b7f55e3b0d23acaa125d598dcaafe18c SHA-1: de15be76b5926a429644cbe563dc29a12918cec5 SHA-256: 994d79f5321dae66cab0c636d2c8b9ddf2ae82205ed014cf17d7dece43572ac7

66 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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=unusual+properties+of+water+worksheet PDF link annotation
- https://cdn-cms.f-static.net/uploads/4383800/normal_5f9b16ed21183.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4389586/normal_5f9b349a59e81.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371025/normal_5f942b340b826.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479460/normal_5fa5f07904174.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://gudusuk.files.wordpress.com/2020/11/sojasesud.pdfIn PDF document text
- https://zojemadej.files.wordpress.com/2020/11/73587489466.pdfIn PDF document text
- https://rawunimuz.files.wordpress.com/2020/11/atticus_closing_argument_worksheet_a.pdfIn PDF document text
- https://dufakeribeze.files.wordpress.com/2020/11/motubidewowi.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ba527bca-1fb3-4273-a9e9-8c929a007de9/39409475279.pdfIn PDF document text
- https://dututired.files.wordpress.com/2020/11/duregepusewu.pdfIn PDF document text
- https://fuxuvonif.files.wordpress.com/2020/11/zodaxikewejejegupinuro.pdfIn PDF document text
- https://tatosotodu.files.wordpress.com/2020/11/giwijusit.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.

Filename	Kind	Source	Size
`font_00_sfnt_off00006407.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6407	5136 bytes
SHA-256: `9a88070c4f360a6ea65c1a074ea516b7b279cacbe6eee536e3acd22f19503eb6`
`font_01_sfnt_off00007590.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7590	10676 bytes
SHA-256: `75c3b6398fdcc8fbe313ddea83b8f929a022db025d42c7f3bea8f082cbe8d7f6`

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