Malicious PDF — malware analysis report

Static analysis result for SHA-256 6672148f3e010b7e…

MALICIOUS

PDF

46.7 KB Created: 2020-11-09 04:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2731aa8418991a22a907b29818d94539 SHA-1: d832c9388a09433ad2c67531fbd08ef3aceae94e SHA-256: 6672148f3e010b7e097ea0589d45720b3fbf0def4b261401fd4143d974ac1657
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://trafffi.ru/123?keyword=the+blue+macaw+bird PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8891b6dd190.pdfIn PDF document text
    • https://sodumixiseto.weebly.com/uploads/1/3/4/3/134311801/piduvabugevulini.pdfIn PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/dubipani-govatepubef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_5fa573db6c648.pdfIn PDF document text
    • https://degitigurot.weebly.com/uploads/1/3/4/3/134337886/getenene_nirelujidup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5f9c23baa647d.pdfIn PDF document text
    • https://zuparimetusu.weebly.com/uploads/1/3/1/3/131378993/xonasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f8b9b30e00c5.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/geponafomi-nipas.pdfIn PDF document text
    • https://dududizenipurij.weebly.com/uploads/1/3/4/6/134651263/27fd02.pdfIn PDF document text
    • https://telenegogak.weebly.com/uploads/1/3/4/5/134522167/sipisewizafozunu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7728 5180 bytes
SHA-256: 57ca79114687dde51e14ef9e44601ca2c36470c9d3694eda221651f2f17e12f4
font_01_sfnt_off000088a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 11204 bytes
SHA-256: 80446fa9e68b62ba7d82c8988003254548e4cdaf312de6d128bf1c10ef787966