Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0582c5bbc0dccde…

MALICIOUS

PDF

77.3 KB Created: 2021-01-29 01:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 35973fc276aaf2903a05cf9106e3bb09 SHA-1: a9f3104a403680e907b5fc763e0d1bd562674e5c SHA-256: d0582c5bbc0dccde455352aa86abc7f640ab51e1a391e32ee3057ae8422bf033
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics point to the PDF acting as a link farm on disposable hosting, likely to trick users into downloading further malware. The presence of external URIs and a 'download button' lure reinforces this phishing-based attack pattern.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/123?utm_term=the+effects+of+the+industrial+revolution+dbq PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fed3c7e4dfa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_6013461dd6403.pdfIn PDF document text
    • http://kelnoteres.xyz/nujanisijarosizaro81dl9.pdfIn PDF document text
    • http://puwisagoki.22web.org/ser_bachiller_evaluacion_gob_ec_resultados.pdfIn PDF document text
    • http://fdvsefwfrw.space/wilegziize.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421205/normal_6003ce011aac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fd3d9727f839.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479222/normal_5ffaa162ded42.pdfIn PDF document text
    • https://cdn.sqhk.co/xidupesijij/jiijage/pubup.pdfIn PDF document text
    • http://wiruribadusa.iblogger.org/industrial_attachment_report_declaration.pdfIn PDF document text
    • http://gakmancreatures.ru/8581692736uqmaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folujas.epizy.com/99399546887.pdfIn PDF document text
    • http://vugikalijuboxo.epizy.com/arduino_pro_mini_datasheet_3._3v.pdfIn PDF document text
    • http://tifureboriva.epizy.com/ephesians_bible_study_guide.pdfIn PDF document text
    • http://rakemexovujepez.epizy.com/vubakegitenijutig.pdfIn PDF document text
    • http://zoxutuperovizo.epizy.com/jetadmin_installation_guide.pdfIn PDF document text
    • http://dexegesen.rf.gd/94665385268.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/english_to_odia_dictionary_app_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/algebra_equations_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wupuxus/agnes_martin-_lugand_books.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_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 5384 bytes
SHA-256: 72ae363934485789f2c83ee3cc5633e942792b1660db334b845f5f33b7a181fd
font_01_sfnt_off0001027a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027A 10852 bytes
SHA-256: 1b92be343b616baf6e061851ce31fb97e590069e9e20da2b6f513bcf404d37b6

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