Malicious PDF — malware analysis report

Static analysis result for SHA-256 66bd30252a484136…

MALICIOUS

PDF

74.7 KB Created: 2021-02-27 17:19:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: cd8f0846b9e97b299655d0905e7cbe0e SHA-1: 4f0cbbd1946bab1c9492d5d47e657accce879041 SHA-256: 66bd30252a4841366d643eadd2cb52bb89ff33c81212b465375cf5e1f6a3ac5e
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains or link farms, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs further supports the idea that these are part of a campaign to drive traffic to malicious sites.

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://ponafet.ru/123?utm_term=apollo+twin+usb+windows+10 PDF link annotation
    • http://gakukuketisalum.scienceontheweb.net/everstart_multi-function_jump_starter__battery_charger_manual.pdfIn PDF document text
    • http://sebaxupakokak.22web.org/chuyn_t_file_nh_sang.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/wix_add_files_to_google.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/iL39vic/95637208400.pdfIn PDF document text
    • http://rolapisi.scienceontheweb.net/la_guerra_de_las_100_horas_entre_honduras_y_el_salvador.pdfIn PDF document text
    • https://cdn.sqhk.co/xazururoxe/zq8Vihe/super_raiden_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/TvjjnYn/pevirudavexe.pdfIn PDF document text
    • http://soguged.22web.org/pewabum.pdfIn PDF document text
    • http://rogumim.iblogger.org/faluru.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/how_many_employees_does_macys_herald_square_have.pdfIn PDF document text
    • http://larediwavokib.iblogger.org/wine_labels_template_free.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/how_to_open_beko_washing_machine_door.pdfIn PDF document text
    • http://forovasax.medianewsonline.com/risadajevuzibulenip.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/jigciiG/25240221984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_6017be6fd03af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lixugafepujijoj.onlinewebshop.net/does_lifting_heavy_make_you_bigger.pdfIn PDF document text
    • http://jifejibi.epizy.com/exercises_reported_speech_questions.pdfIn PDF document text
    • http://bebinuvejaxate.rf.gd/agrarian_reform_and_legislation_in_the_philippines.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/how_much_does_it_cost_to_replace_a_tankless_water_heater.pdfIn PDF document text
    • http://rajixubododafu.epizy.com/dc_animated_movies_2017.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_off0000e41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41D 5064 bytes
SHA-256: 1c91aef919024ceb64f197b2af6d554039efd36d5705abc5a0f628ce837fcea8
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 12004 bytes
SHA-256: 1874543732dd374f4611064fc78dbc6728d74c18b882087eeb049f1b2a023c73

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