Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab983b4b4513914d…

MALICIOUS

PDF

94.6 KB Created: 2021-03-30 23:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b2fe3daf721d56baf6833d4498bf41d2 SHA-1: 043295c838ae538a2f0f9d7fadbf15226fcc6a07 SHA-256: ab983b4b4513914d189977bcb8be2dda54a6702a3350aa50a7b496b7fc62e340
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links to known malicious redirectors, indicating an attempt to lead the user to harmful content. The heuristic firings suggest this PDF is part of a link farm designed to obscure malicious destinations. The presence of a password archive lure heuristic further suggests this document is a precursor to a more significant malicious payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/123?utm_term=blazer+cutting+video In PDF document text
    • https://cdn.sqhk.co/rotonoba/hghdAgf/gixiretabanubamogejusa.pdfIn PDF document text
    • http://naykaryadom.fun/20063282049tglvd.pdfIn PDF document text
    • http://realnoe-obshenie.online/wedding_invitation_email_template_freekt9tm.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/f1mYiim/flight_status_sfo.pdfIn PDF document text
    • https://sexuviruzimi.weebly.com/uploads/1/3/2/8/132814305/19c112f214e7.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/fevLwhg/captain_america_civil_war_movie_imdb.pdfIn PDF document text
    • http://trastenmyqort.online/poriwozift55sy.pdfIn PDF document text
    • https://jenejipita.weebly.com/uploads/1/3/4/4/134473981/jepusu.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/pixotokolodovurilut.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/5368616.pdfIn PDF document text
    • http://bio-ita.fun/xexixc8o6i.pdfIn PDF document text
    • https://zeleloda.weebly.com/uploads/1/3/0/7/130776222/3013353.pdfIn PDF document text
    • http://eurozone.pro/valkyrie_crusade_reroll_guidesj2ch.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/cjbk6jb/tic-_tac-_toe_family_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/fhiifjj/frozen_cod_fillets_recipe_easy.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/muvowexetetupofebosi.pdfIn PDF document text
    • http://tk-pobeda.site/security_analysis_and_investment_management_bookspsz3.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
    • https://s3.amazonaws.com/wovisak/tizeweko.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/viladawulumegisij.pdfIn PDF document text
    • http://pajupevezujugut.atwebpages.com/diversification_alimentaire_bb_6_mois.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/checklist_template_for_project_planning.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/jepelomojegozebezeg.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/school_uniforms_are_bad_articles.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_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 4968 bytes
SHA-256: f17edc5669033fe717fbeab0783840d728adfcab3873554c84080a6942793bc9
font_01_sfnt_off000137fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137FB 11064 bytes
SHA-256: be3ea2d8513bbcf7492c2d5943648c297e481a193719d4794050d4765bca0e1a
font_02_sfnt_off00015d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D66 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34