Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6fb994f64480904…

MALICIOUS

PDF

68.0 KB Created: 2021-02-11 02:40:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 125f46671a5f409b2df6d8dc6253700a SHA-1: 32093174a799de62984771347fd565269bc6a1a0 SHA-256: b6fb994f64480904ecd183ab2ef4712975497055bc2a48a7b4959231d4bac34d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wb?keyword=nac%20network%20access%20control%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376101/normal_6004eb8403817.pdfIn PDF document text
    • https://bopovajo.weebly.com/uploads/1/3/5/9/135966354/513d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/dagidomu/dns0zhf/stack_fall_3d_game.pdfIn PDF document text
    • https://cdn.sqhk.co/pimibopugugo/ighgAO9/wazuzivewolitetoku.pdfIn PDF document text
    • http://kobasobapina.22web.org/zelogefo.pdfIn PDF document text
    • http://tojanulisito.iblogger.org/application_for_canada_pension_plan_retirement_form.pdfIn PDF document text
    • https://cdn.sqhk.co/fegukajebaj/eieDkhi/universal_g_code_sender_grbl_1._1.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/NUV4yih/truth_or_dare_questions_over_text_message.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_6021c26d83ea3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butevagowug.epizy.com/tank_hydro_test_report.pdfIn PDF document text
    • http://buvumitibeve.rf.gd/xitojeboxu.pdfIn PDF document text
    • http://fomupobidep.epizy.com/39283863880.pdfIn PDF document text
    • http://tefotesibeto.epizy.com/vidovaz.pdfIn PDF document text
    • http://juxudawalugevop.epizy.com/ruseneditamamiluwupiva.pdfIn PDF document text
    • http://mugevewobota.rf.gd/84973271992.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_off0000ce75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE75 5276 bytes
SHA-256: 068b9c5cd3064c56d881d935980883fd206925c11860377a52d5669de6cfbb0f
font_01_sfnt_off0000e08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE08E 10224 bytes
SHA-256: 8bdb4addddc9ad95ee7166d243661c5db6608828e662280f202cc85d6c2fe626