Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8103f131c85a9bd…

MALICIOUS

PDF

71.0 KB Created: 2021-02-24 01:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 30b58ef42d85556d4bf8a9e56a6439a2 SHA-1: f32167e597ff4fb217050b193e480dcdd076117e SHA-256: c8103f131c85a9bdc76fa6c6813e9e4d5109d87f8f139d4be6062ce190e54adb
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=guide+license+oregon PDF link annotation
    • https://cdn.sqhk.co/molipigi/jiygjcu/18606460564.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/2hb6heF/bowmasters_free_download_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/raluzafa/ygdjbyP/zawobofugedetuxesobenix.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/sajujanabeposa-lawiti.pdfIn PDF document text
    • http://itali-big.space/buborofekikipevalemepo02m14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_600a405eae397.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/IzYEUhd/jomituxibetuvuvezot.pdfIn PDF document text
    • https://cdn.sqhk.co/sadebupunen/7IzdIhi/vesuzasofaxojisix.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/VrO8idi/gipovamiravaf.pdfIn PDF document text
    • https://xotozefubineru.weebly.com/uploads/1/3/4/5/134576546/466571.pdfIn PDF document text
    • https://wavadubo.weebly.com/uploads/1/3/0/7/130775728/c37e0a38c8e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://koxowasone.epizy.com/phone_caller_location_app.pdfIn PDF document text
    • http://talaxevavilur.rf.gd/lettering_templates_for_applique.pdfIn PDF document text
    • http://lowuzoduveloga.epizy.com/brain_teaser_matchstick_puzzles_with_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 4732 bytes
SHA-256: 00bb4ce9bd8cf75570d6be65fe0feead714e5b2faabc54b394780b5ea3ceee0b
font_01_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 9972 bytes
SHA-256: e83c13292c63973c75d0a0c2a097fefb122e8225bcbe35e5a481391c9c08ffae
font_02_sfnt_off00010162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10162 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2