Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f9a44afb6b8990…

MALICIOUS

PDF

36.8 KB Created: 2020-10-12 00:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 644b65f4aadb237b44cf0c37ed84b7d9 SHA-1: c3725eccd529179b5dd99c40cfab5790713e27f1 SHA-256: b5f9a44afb6b8990a4bba87a6120d9ef62cd3c9604e12c8b1efb9ca028891387
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=wii+u+error+code+105+3016 In PDF document text
    • http://tewexatiw.happy-wife-spirit-life.com/uploads/1/3/0/7/130740510/kamaxuxazovevuram.pdfIn PDF document text
    • http://files.thechurchinindianapolis.net/uploads/1/3/1/0/131070520/kobenige_jujonotag_mijenazumeno_jowun.pdfIn PDF document text
    • http://files.kimberlyswritings.com/uploads/1/3/2/8/132814166/bf6e33ee44284.pdfIn PDF document text
    • http://files.koiyamariephotography.com/uploads/1/3/0/7/130738603/relira.pdfIn PDF document text
    • http://files.kreisherengineering.com/uploads/1/3/0/7/130738531/rawimibawisubi.pdfIn PDF document text
    • http://files.dhruvk.com/uploads/1/3/0/7/130776069/lameke.pdfIn PDF document text
    • https://site-1045384.mozfiles.com/files/1045384/23123414632.pdfIn PDF document text
    • https://site-1041864.mozfiles.com/files/1041864/nuvotidaseluluweri.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/9845899805.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/80354941481.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/f11b4914-f218-4b59-85cb-fc49157e7c00/pijovatugugam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a54a8be-4b77-4f04-942e-4f7d1cde54cd/gamomusiges.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79400ebd-252a-4c4e-9afd-715754e7d4a3/jofotafut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fd9d00-b53c-4b3f-814e-83909ec7ba2b/77912105333.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_off00005292.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5292 5164 bytes
SHA-256: b2475eaef1dd0693f380dc3f607a9817a339ab2e9c939406c87d96b8fa6e0c49
font_01_sfnt_off00006444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6444 10028 bytes
SHA-256: 85d4de03d3380ac35447717eef2e2bb0d4ed25b5f93e70d011e9b614b98e2ea8

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