Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2f339b23f3f30a…

MALICIOUS

PDF

78.7 KB Created: 2021-03-06 07:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 557aa506783e3778376ddeca3496c825 SHA-1: 9217a703e824f989bff6cb4e1e145754ade099ca SHA-256: 8e2f339b23f3f30a5e7da50b791823905d4152a07f13a8cc2daa3a8f046a5eac
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating it likely contains exploit code or phishing content. It functions as a link farm, embedding numerous external URLs that point to other PDF files, suggesting a multi-stage attack or a method to obscure malicious destinations. The primary purpose appears to be directing users to potentially harmful content hosted across various domains.

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://jacksth.ru/award?keyword=what+are+the+three+genres+of+shakespeare%2527s+plays PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5fd92d9beb33a.pdfIn PDF document text
    • https://cdn.sqhk.co/savujegu/ighinCV/puputifabisawug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471988/normal_5fd773f869db8.pdfIn PDF document text
    • http://amst-watch-v2.club/91134358846lhjvq.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/48811a13e1c1.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/4785426.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/ibjgyhh/steel_and_flesh_2_mod_menu.pdfIn PDF document text
    • http://car-den.ru/the_asset_turnover_ratio_is_computed_by_dividingx2lww.pdfIn PDF document text
    • https://nolilozeto.weebly.com/uploads/1/3/5/9/135957670/dobeb_dogimuj_lubixamu_juvidola.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/jAge2if/vusazibewivilusebon.pdfIn PDF document text
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/5550548.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/RlYgg85/nba_2k20_ps4_my_career_review.pdfIn PDF document text
    • https://bovabesizepin.weebly.com/uploads/1/3/1/3/131383515/1599666.pdfIn PDF document text
    • http://voiprormul.xyz/visual_basic_2010_sinhala_tutorialu611l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/59643517985.pdfIn PDF document text
    • https://15319a82-8c66-4906-b3c2-464277991f2b.filesusr.com/ugd/070acf_38b56afae9414b98932978ad5653a0f2.pdf?index=trueIn PDF document text
    • https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_aea0c953dc2e43b9a375213e59dbc5da.pdf?index=trueIn PDF document text
    • https://217ba8a6-026c-4a9e-b1ce-2eadff0a4a08.filesusr.com/ugd/3d7af5_3ea6b5a793fa441b8d3551971586b1ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/java_concepts_early_objects_7th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/11709548720.pdfIn PDF document text
    • https://05f6fcc2-a4c7-4d5b-b58c-97b640a93f4d.filesusr.com/ugd/74147a_004567ae796e4223994bc4f5a7135653.pdf?index=trueIn 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_off0000f7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C4 5376 bytes
SHA-256: c019c2501edbf1e08f6edc7d9df55bea8ad299132539dce6bca853a16dffc6a3
font_01_sfnt_off00010a2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A2D 10240 bytes
SHA-256: b32e1b3242cc97fc1dcd1de35c8805180844a27c99b547acd4be38b6d48127f4

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