Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dfad64feea7cb17…

MALICIOUS

PDF

76.4 KB Created: 2021-05-14 06:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 252b726653cd7092b677ea7ae14c4c7c SHA-1: 57af81a41c645fefe3d820362e988aa77089837a SHA-256: 4dfad64feea7cb173b32e2688a378eafffa935b346cfcc9252c3624754e460e2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body and embedded URLs suggest a phishing or scam attempt, directing users to external sites with search-like queries. The presence of numerous links to disposable domains further supports a malicious intent, likely to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/strik?utm_term=karcher+k2+pressure+washer+parts+diagram PDF link annotation
    • http://jugapus.sportsontheweb.net/new_international_business_english_student_s_book_download.pdfIn PDF document text
    • http://it50off.pro/what_is_the_fee_for_usmle_step_1pw1gh.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/hoja_de_seguridad_del_acido_acetico.pdfIn PDF document text
    • http://kartaidatodemeleri.com/zovepizumedepinanavt73wr.pdfIn PDF document text
    • http://alifan.store/fusotibupufejxvq55.pdfIn PDF document text
    • https://cdn.sqhk.co/boxumiza/gDmgdPl/minecraft_pixelmon_mod_newest_version.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/Coljfza/20686375296.pdfIn PDF document text
    • http://alex-travel.moscow/28816984716df7w8.pdfIn PDF document text
    • http://jaxagogilexet.sportsontheweb.net/84944988857.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/dark_souls_3_covenants_offlinelzxx8.pdfIn PDF document text
    • http://mobile-media.moscow/are_ps4_turtle_beaches_compatible_with_xbox_one0c3qm.pdfIn PDF document text
    • http://prizinsta24.space/8881034357iu3q9.pdfIn PDF document text
    • http://casser.xyz/xanemejiwafodbue9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xasagode.myartsonline.com/freud_three_essays_on_the_theory_of_sexuality_standard_edition.pdfIn PDF document text
    • http://mimuzef.rf.gd/cell_biology_test_questions_and_answers.pdfIn PDF document text
    • http://tuxabatadifu.onlinewebshop.net/25381791814.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/drools_feeding_guide.pdfIn PDF document text
    • http://xumusuriwo.rf.gd/esmo_guidelines_rectal_cancer_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/37764047959.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_off0000eb8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8C 5712 bytes
SHA-256: c5ba767b859d8325b953f4e3fd04b25d856fbfdb8f1da97c03258bd095f57591
font_01_sfnt_off0000fee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE4 10916 bytes
SHA-256: f99e72f105f60cf41e3c00b3b95cce1ffcc03d84bfa0ea4891b932dcd8b8e400

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