Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4ae79f8160ba567…

MALICIOUS

PDF

48.1 KB Created: 2020-11-09 11:47:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 67ed6c0a5ac76587d1e69fc0632e69c2 SHA-1: 3994f32b633a0492e50cacf4d289db2f237fc1ab SHA-256: f4ae79f8160ba5674a360a5cc02be1d773926f473f33f655c06d36e4290ed392
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://trafffe.ru/aws?keyword=jellyfish+spongebob+song PDF link annotation
    • https://sowuritujozefa.weebly.com/uploads/1/3/4/6/134621612/kajid-kudubuvo-loximo-kivepopunopora.pdfIn PDF document text
    • https://wuxepufoz.weebly.com/uploads/1/3/4/3/134371519/7409538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f8e15ac3b333.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/tutigimuxewovif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390373/normal_5f92ef70028a6.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/4270001.pdfIn PDF document text
    • https://nikokitigo.weebly.com/uploads/1/3/4/5/134500207/1910980.pdfIn PDF document text
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/jafoxodegopanufekol.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/acd1236b.pdfIn PDF document text
    • https://lorujuxivole.weebly.com/uploads/1/3/4/5/134595667/8599183.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/xodibebovakafe-fosurapifibuna-xewaf-vilujetugowuva.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/13d89c6c-2c5f-4eef-962a-3623a922a7d0/set_based_design_lean.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7349dc-4127-49f9-bdb5-144779578f53/bovevilivokexo.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_off00007db0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB0 5088 bytes
SHA-256: 60224c93c3c101fc9702695fd78de1ffcb248f011f50e739a960f2c6cd715c3d
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 10908 bytes
SHA-256: 6f2af2f374e7b711710885e6ad55633a4c23df5873eaedf33f41288f7acfc1fa

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