Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05c43e630a6e13e…

MALICIOUS

PDF

72.9 KB Created: 2021-02-18 00:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 500c6710345c0ee530f9813921b32aa9 SHA-1: db5eceb5bc1f9208233b2c18e04949f5e35a5016 SHA-256: f05c43e630a6e13e06923844c64e52df7282868da2deb2a8422340369c046b1f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/123?utm_term=diehard+platinum+battery+charger+parts PDF link annotation
    • https://cdn.sqhk.co/mexovaru/rjdJ31A/woodworkers_guild_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498883/normal_5fcc0f269c75b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478415/normal_60124f3074d16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481839/normal_600db10ba588a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_5fd2c460bade9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_6018374850ed5.pdfIn PDF document text
    • https://xukizawumu.weebly.com/uploads/1/3/1/3/131380236/sozavikim.pdfIn PDF document text
    • https://guxumexowe.weebly.com/uploads/1/3/3/9/133999944/golofakaturabip_digux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_602c77390d1c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabikelotedabe.epizy.com/kigegidoximibamokeje.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/92062376590.pdfIn PDF document text
    • http://pimokizogo.epizy.com/banner_mockup_psd_template.pdfIn PDF document text
    • http://nozovov.rf.gd/85417565161.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/freepik_template_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bochenek_anatomia_czowieka.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_off0000de4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4C 5728 bytes
SHA-256: 312d2782cc9892b2db27f085d601e3aaee8cfe0912c7c239a39adeb0df843cc8
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 10800 bytes
SHA-256: 8ee0984927b6c4138217a428c994b82bb1d6a8a6b93c42daeba953879102782a