Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d726b704b420b2b…

MALICIOUS

PDF

77.5 KB Created: 2021-02-28 22:56:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e48bee74a162b9296eaca0df66021497 SHA-1: 1d1b7327c536346822e085fd41a2cf949e00fe3e SHA-256: 4d726b704b420b2b99300093ad2ef04c47cf331af0e1222925f5572425cbb730
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically related to phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful sites.

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://gimoguvi.ru/123?utm_term=how+to+find+the+stopping+time+in+physics PDF link annotation
    • http://gekodejevotug.medianewsonline.com/89562300922.pdfIn PDF document text
    • http://dfds.in/82174884173498wt.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/25262187232.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/risitoxe.pdfIn PDF document text
    • http://distornyup.site/fdic_call_report_codes0xmba.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/76855629509.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/74871771811.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/79658609902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464730/normal_5feed8397bd8c.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/how_to_fix_volume_on_directv_genie_remote.pdfIn PDF document text
    • http://loduwij.scienceontheweb.net/23005231930.pdfIn PDF document text
    • http://agencymedia-ig.com/iycf_guideline_ethiopiajqy7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fc906e00c074.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473619/normal_5fd1cc1fc8577.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/xakajoziwibi/barium_chloride_physical_form.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/53335883091.pdfIn PDF document text
    • http://jokosen.atwebpages.com/37056298583.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/encyclopedie_homeopathie.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/bvh_motion_capture_files.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 5388 bytes
SHA-256: 7058b3fc26ac15ffafac77656a1aa1d814e67b31e4446cf9d46e9dd0623e619f
font_01_sfnt_off0000f98b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98B 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off000104ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 10424 bytes
SHA-256: 8cff6457b158145cf47747c0ac2aaab5acf5e75842a0428d5cfb10eb55e72b56

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