Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c75bc8450e4766…

MALICIOUS

PDF

72.2 KB Created: 2021-06-13 08:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 91baf96f76558f8407b8946d8b207883 SHA-1: 0a4ecbec5176de43c8d5a8b5b912e29806aa54ef SHA-256: 64c75bc8450e4766a231a51fb2d494b18d86bcd8fbac9ce5cb34f2035eeb312f
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 and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to 'garglob.ru', suggesting a phishing or malware distribution attempt. The PDF's structure and the presence of many links on disposable hosting indicate it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://garglob.ru/pbw?utm_term=hotel+front+office+operations+and+management+jatashankar+r+tewari+pdf+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480393/normal_5fca07d751de9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_6030868848b44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372972/normal_5fdd5ff0d7409.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_6039014094503.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sagabum.pbworks.com/f/78854582671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/769aecff-eb05-4971-84c2-067c48e6fd14/revista_gamepro_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ccb86f-4190-4190-ba25-b8ef3ffc5ef7/ati_nursing_books.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/f/m_laxmikant_indian_polity_in_hindi_flipkart.pdfIn PDF document text
    • http://kakewizajupe.pbworks.com/f/dekefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b36a23eb-9580-41ab-a28d-a6ceaf1a7c62/77600327167.pdfIn PDF document text
    • http://funesut.pbworks.com/f/neet_question_paper_solved.pdfIn PDF document text
    • http://veposasidot.pbworks.com/w/file/fetch/145084692/kingsman_movie_download_in_tamil.pdfIn PDF document text
    • http://ganosidil.pbworks.com/w/file/fetch/144601233/74619676180.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144501168/60018712352.pdfIn PDF document text
    • http://dadilotofexi.pbworks.com/f/romagajoganewidigotuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f47757-a505-4340-979d-25b35576dd99/41469895585.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/best_toaster_air_fryer_oven_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8e96271-0ff1-4f4a-b44a-0c02dbd35e1c/rarul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14796bca-f4c5-4003-beb5-fba9544d8012/jezinoduxafekonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aab0ab3b-728e-4447-bdb1-40175ce5a5f7/how_to_program_my_xfinity_remote_to_my_vizio_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03472836-bd75-4b5d-b724-3da121ee115d/25044162136.pdfIn PDF document text
    • http://bitejite.pbworks.com/f/65935193491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31700cb7-6b97-412a-8640-e97a5100709c/google_classroom_originality_reports_available_meaning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54033ef8-6457-4511-b0c6-2d6dcde0afd3/what_is_reference_code_ige-9000.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_off0000da9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9D 5764 bytes
SHA-256: d6b3b6316340308fe5c57b2c2b35ae9f7bd1682b7321f4af0d7ada75a7934cc6
font_01_sfnt_off0000ee1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1D 10760 bytes
SHA-256: 425000e79ad74cfe4b423a40649deca6a47c24e6fe224268fcd71c547f7a30ce