Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e5ffdd6fc26eea…

MALICIOUS

PDF

70.8 KB Created: 2021-02-25 00:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5225fc459f0cd687ee9195d97096366d SHA-1: 25741f3aaf6950645437b55914e2fbe44bd44ac4 SHA-256: f4e5ffdd6fc26eea116452cf65864e2f671911814f3ecfdcb77930734f15c466
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. The document contains a large number of embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/award?keyword=ham+egg+and+cheese+sandwich+dunkin+donuts+calories PDF link annotation
    • https://cdn.sqhk.co/wukatigubo/8TAgfTI/radiant_wraps_heater_covers.pdfIn PDF document text
    • https://cdn.sqhk.co/rodoruwuwab/DuJifhi/sad_glass_to_happy_glass_game.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/princeton_review_mcat_physics_reddit.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/software_testing_jobs_in_canada_quora.pdfIn PDF document text
    • http://kivikevakefum.22web.org/extruded_steel_sheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446647/normal_5fceabb55d96b.pdfIn PDF document text
    • https://cdn.sqhk.co/sadopore/FieYUie/damipujebi.pdfIn PDF document text
    • http://tronreserve.online/area_of_shaded_and_unshaded_regions_worksheetn6vbo.pdfIn PDF document text
    • http://nasty666.space/team_building_forming_norming_storming_performing_pptfclg2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://josejutolaxof.rf.gd/bondhurey_muza_song.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/articulatory_phonetics.pdfIn PDF document text
    • http://zukusuvajijip.epizy.com/80759503247.pdfIn PDF document text
    • http://rogofideb.onlinewebshop.net/76488242090.pdfIn PDF document text
    • http://lokatetaf.rf.gd/dura_heat_forced_air_kerosene_heater_parts.pdfIn PDF document text
    • http://jofawapedoguw.rf.gd/aura_carlos_fuentes_espaol.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_off0000cca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA0 5468 bytes
SHA-256: 5adbe83810f9b2378900ed9da4d37e35fc5c2f0c3168f54ec9e36adc951e5c33
font_01_sfnt_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 15064 bytes
SHA-256: cd390188768ecb59c4d20a243505036383eaa84c236241321682213f6ee240a6

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