Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fdb0e7591f3666…

MALICIOUS

PDF

74.5 KB Created: 2021-04-14 09:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7a902b3feeda277ae9ba55d3608fa4c2 SHA-1: 64d69a99545431ff4fc32612100d4c7ba0aa13e0 SHA-256: 49fdb0e7591f366623cb5a77ff2ba06e7eedf16301e35097b050d49e8b53b1c7
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs and the heuristic findings point towards an attempt to trick users into downloading or visiting harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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://jacksth.ru/strik?utm_term=plant+physiology+and+development+sixth+edition+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/puxitika/ggiAjef/encyclopedia_dramatica_offended_challenge.pdfIn PDF document text
    • http://dle-tpl.site/jarajofodixpkp3y.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/hibb1jg/fast_colors_movie_cast.pdfIn PDF document text
    • http://zofunubesosena.mypressonline.com/chava_marathi_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifoxunif/hDgjNii/introduction_to_business_management_questions_and_answers.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/35991793626.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/wHHwhcF/pinball_cadet_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/wexovezojab/Zovjeic/54804153935.pdfIn PDF document text
    • http://reduslimitaly.website/95488293884k0kd8.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/jgh5Ymg/theatres_yakima_washington.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/caia_level_2.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/7pigidC/67682975858.pdfIn PDF document text
    • http://freshnatur.fun/921097521866p6uu.pdfIn PDF document text
    • https://cdn.sqhk.co/zibomevuguli/hj7ieb2/18771825524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_2ceb11672b0f4df7af8f1a6a9b62b767.pdf?index=trueIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_4d02e21e0fe54568b76f3cd96e894379.pdf?index=trueIn PDF document text
    • http://lugimeviguv.myartsonline.com/convert_to_word_document_that_can_be_edited.pdfIn PDF document text
    • https://997b2cc2-d96d-4654-b184-8a5d7ad473c0.filesusr.com/ugd/b8d08c_59d43b4306c249a2b7fc5e9a6c591ea3.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_afa5455064b24745834263801848c76f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02c4053a-2aa2-475e-9f35-f5c4efb895e7/how_to_be_freelance_proofreader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1bd9c77-a237-4c4b-ad05-3372aeea8296/what_is_free_flowing_brown_sugar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0290d7d7-7ef8-444d-877f-fff2d502e385/how_to_use_my_bissell_proheat_pet_carpet_cleaner.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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 5780 bytes
SHA-256: 5b21a97df861c5725ddeb3c336d73145dc26e2d5ed78a533a69b26db3ba1d6b8
font_01_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 10316 bytes
SHA-256: 6432bea7acb78d7daadf3c72c97aa978dfea5363226160b2ceed5eae36432cfd