Malicious PDF — malware analysis report

Static analysis result for SHA-256 540b42f961a73587…

MALICIOUS

PDF

68.3 KB Created: 2021-03-29 05:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 703a82b02eaa0d40b4dd4fa835437fbc SHA-1: bee05fed87d96e0c77c090036e806c17029bc4bb SHA-256: 540b42f961a73587775277baaba6152f447a1333fb6b142f7513e3f7e581a5d3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The embedded URLs and the document's structure suggest it functions as a link farm, directing users to potentially malicious websites. The ML classifier also strongly indicated maliciousness, supporting the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=tyrone%2527s+games+unblocked PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369660/normal_5fc9778911917.pdfIn PDF document text
    • https://cdn.sqhk.co/xefilelo/Ehfhhfp/energy_blaster_coh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447663/normal_5fd67cba88710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_6014dd4ab006e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401703/normal_5fcccd8794088.pdfIn PDF document text
    • http://rugozuravonabib.22web.org/black_boy_names_that_start_with_ja.pdfIn PDF document text
    • http://nojagemegoxeda.22web.org/97358986972.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_603585e1881d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_6009dc7ad0220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446017/normal_602e1cdf1db85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_60066c28e9db7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466143/normal_5fe8e6331a8c7.pdfIn PDF document text
    • https://cdn.sqhk.co/zusisoko/fjaichQ/33369141948.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366005/normal_5ff67828d4a4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzufuwav.rf.gd/9030941169.pdfIn PDF document text
    • http://jepujaburadobiw.epizy.com/avg_pc_tuneup_free_trial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0c131a-5f91-47f7-9533-91cd46e3e5e7/wejafotakini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662dd090-4e91-4a19-b71c-1454f0e71a04/latin_root_word_mitosis.pdfIn PDF document text
    • http://lirepemewepe.rf.gd/que_pedir_de_intercambio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e359ec44-e2b7-428d-b360-69cf88df0602/14449140187.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF2 5548 bytes
SHA-256: 151b0681dda65f8eae1319ea9c073bd5f863d261aad87f4c41352c867cf240db
font_01_sfnt_off0000dfc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC4 10672 bytes
SHA-256: 273d7ad7fd4122696f6b86794a483e4e878c8b49f83756958d7a1990c65de5e5

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