Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4db121ca8174df3…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 16:46:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab98c951cb32d12b6f05e0f671d5f5eb SHA-1: 179ed7980cc61feb3d9f66453534c38a558fa19a SHA-256: a4db121ca8174df3a5f5fd10b30ebe6aedb54aa7d22caf0bff494085c33ad949
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many pointing to disposable domains, which is characteristic of a link farm used to distribute malicious content or facilitate phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links suggest an attempt to lure users to external sites, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=sierra+125gr+30-30+load+data PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475217/normal_6046036b8bbfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456728/normal_60403f947e0a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404520/normal_5fd2d8837cb9f.pdfIn PDF document text
    • https://cdn.sqhk.co/golemejexeno/0ibjhhe/farm_heroes_saga_levels_with_fireflies.pdfIn PDF document text
    • https://cdn.sqhk.co/netimawifes/VNicWcT/csr_racing_2_pc_car_list.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/sinukudikupipake.pdfIn PDF document text
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/1576151.pdfIn PDF document text
    • http://makedctl.site/9395360925lophg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_600f203fa6779.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/identifying_figurative_language_worksheet_1_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/fudimesa/hhgGlgi/19560749917.pdfIn PDF document text
    • http://aazzzry.space/diamond_mobile_legend_free_tips1bumq.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/39728290611.pdfIn PDF document text
    • http://1xbet-registr.site/what_is_a_democracych84m.pdfIn PDF document text
    • http://minuette.me/camp_x_ray_movie_download_300mb8e5bp.pdfIn PDF document text
    • https://xubidanata.weebly.com/uploads/1/3/4/8/134895671/jaliwimokuxujivexif.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/fundamentos_del_marketing_digital_google_respuestas.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/YhbjjSN/i_love_crosswords_2_level_19.pdfIn PDF document text
    • https://cdn.sqhk.co/nobixapo/fd0gdha/baby_shark_costume_diy.pdfIn PDF document text
    • https://cdn.sqhk.co/givesaxi/PhgkPgf/fazuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481280/normal_602a8156077f7.pdfIn PDF document text
    • https://cdn.sqhk.co/sebutarukaw/jimicgj/figozik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 5564 bytes
SHA-256: 4566fa22edd863e8eea08882240271586356589a1ef9eb7fa0e6026e3ea5e710
font_01_sfnt_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 11160 bytes
SHA-256: 484abc92577a210b9db4ffb563a58a044fcb2e4b3397fa900483c2603beeccec