Malicious PDF — malware analysis report

Static analysis result for SHA-256 462a70001ec98767…

MALICIOUS

PDF

74.3 KB Created: 2021-03-23 14:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1f09532a471916931bb9c6ea550648fb SHA-1: edb62f04d3d63a27848be1d6e3ee157e468b0646 SHA-256: 462a70001ec98767f1d16dcf6bac2fc9eb7e1f7b4ec86c446c4b11aad0e92cfd
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the PDF structure itself is used to facilitate the malicious redirection.

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://druttle.ru/award?keyword=break+even+point+problems+and+solutions+pdf PDF link annotation
    • http://uablog.site/86353070654bs9v0.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuneduzib/hdsOXgd/97068818799.pdfIn PDF document text
    • https://wozavosasegug.weebly.com/uploads/1/3/4/5/134509229/fomobati.pdfIn PDF document text
    • https://cdn.sqhk.co/piravasufinu/aJjihaq/wadiwixazivubukipukiduf.pdfIn PDF document text
    • http://sinoxesoxeraxer.iblogger.org/pizisijudewogolag.pdfIn PDF document text
    • https://tagopebarezixog.weebly.com/uploads/1/3/1/6/131607889/soluwuvedewulu.pdfIn PDF document text
    • http://avit0.cc/807057011717ynk9.pdfIn PDF document text
    • http://pazoxaba.22web.org/que_es_la_energia_mecanica_para_nios_ejemplos.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/4988124.pdfIn PDF document text
    • https://cdn.sqhk.co/bubiwalifeda/VStnfhg/ricetta_caponata_melanzane_peperoni_patate.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/x3hegcm/61595570972.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/cjdAtNI/81650807079.pdfIn PDF document text
    • http://gituwema.iblogger.org/rosatekenipebek.pdfIn PDF document text
    • http://pesale.pro/electrical_engineer_salary_jacksonville_floridaazahs.pdfIn PDF document text
    • https://bobubimusibobu.weebly.com/uploads/1/3/4/7/134715312/86871682e1.pdfIn PDF document text
    • http://movoxazukum.22web.org/caracteristicas_de_un_ensayo.pdfIn PDF document text
    • http://tozimapowox.iblogger.org/relationship_counselling_books.pdfIn PDF document text
    • http://zipemefud.22web.org/causas_y_consecuencias_de_la_contaminacion_atmosferica.pdfIn PDF document text
    • https://ganuwikudafo.weebly.com/uploads/1/3/0/7/130775291/3387137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c95f08ab-c778-43b8-95ea-f4d919904a78/how_to_factory_reset_windows_7_using_command_prompt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376ec463-6dfe-4ff3-adc3-22e4596fb251/when_god_wants_you_to_be_alone.pdfIn PDF document text
    • http://javisan.epizy.com/nutrition_wendys_spicy_chicken_nuggets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d216ae24-b8df-41ce-85ac-bccda9bdfbe2/conditional_statement_practice_worksheet_answers.pdfIn PDF document text
    • http://daxepusiz.rf.gd/let_it_go_piano_guys_sheet.pdfIn PDF document text
    • http://xutakubu.epizy.com/plus_one_ncert_biology_textbook_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_off0000e109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE109 5500 bytes
SHA-256: 0d8fd826e82fa6859d936b6ca31e0f93e6e0e3f4088aa0e28266ed59e8a812a6
font_01_sfnt_off0000f3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A9 11532 bytes
SHA-256: ef4ad803f380f5b1008bd1cfe7834d0eac515ac98ea651c65ad07c59567d7345