Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c5d717b9af2b29…

MALICIOUS

PDF

88.8 KB Created: 2021-03-23 21:13:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 422ed5ac8d7327e2ad9fbf973cbb0211 SHA-1: 406b97fdc455bef5975246e7e1068c8c84a76dcd SHA-256: 64c5d717b9af2b29bf6ab22caf171c89680ea13b39eb639d12f772cf3156e9a8
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous embedded URLs, with a significant portion pointing to disposable hosting and potentially malicious domains. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=jane+jacobs+death+and+life+of+american+cities+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480162/normal_6050ca7124c61.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/gfihihP/pogaze.pdfIn PDF document text
    • http://wafolepis.iblogger.org/www.bpsc.gov.bd_circular_2020.pdfIn PDF document text
    • http://kowesawu.iblogger.org/zatedajekaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_60310c41d9910.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/dqiijco/rejutowokisazikavegamatas.pdfIn PDF document text
    • https://fulerisigimigo.weebly.com/uploads/1/3/4/5/134586495/7636810.pdfIn PDF document text
    • https://cdn.sqhk.co/pabelewexo/hbS76ge/best_filter_app_for_snapchat.pdfIn PDF document text
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/5447340.pdfIn PDF document text
    • http://kewegagibemidaj.22web.org/sheeted_basalt_dikes.pdfIn PDF document text
    • https://nimivisedasefu.weebly.com/uploads/1/3/1/0/131070972/lewozabivoke.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/ifjjRia/63528042550.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/79193841516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466661/normal_6053650de3172.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449973/normal_601fb2694009e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473963/normal_601d897700881.pdfIn PDF document text
    • https://ravodesukifalav.weebly.com/uploads/1/3/1/1/131163780/kixijinafatewo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mitijolazu.rf.gd/detailed_lesson_plan_in_science_grade_7.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/3979686900.pdfIn PDF document text
    • http://zugemanuzori.rf.gd/learning_needs_analysis_and_evaluation.pdfIn PDF document text
    • http://pipinodojo.epizy.com/acls_test_answers_2016.pdfIn PDF document text
    • http://xelidamos.epizy.com/nba_basketball_games_for_pc_free.pdfIn PDF document text
    • http://zuniguvip.epizy.com/67355923886.pdfIn PDF document text
    • http://buxidojulatur.rf.gd/the_arduino_inventor_s_guide_download.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_off00011efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFC 5600 bytes
SHA-256: a7abe59cb121e21dab1605565000283ded18fc41d2d796099712c5f4081086d4
font_01_sfnt_off000131da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DA 10304 bytes
SHA-256: bcde81e46c12cb98f042ca73d04dcd45948376a6ab632bfd86019c3d943c48e7

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