Malicious PDF — malware analysis report

Static analysis result for SHA-256 c331a9411d41a668…

MALICIOUS

PDF

79.3 KB Created: 2021-03-27 10:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5afde895ca2809b31aea397923d7f66f SHA-1: 2bb43e62be1488ec7a209afc30978763a26380b0 SHA-256: c331a9411d41a668c1734def53ba28eea5779ab959a8b773447a143cbd4c45c4
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms and SEO manipulation. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests an attempt to redirect the user to potentially harmful content. No scripts were extracted, but the overall structure and URL distribution are highly suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • 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://golowaki.ru/wix?keyword=icom+id-5100a+for+sale PDF link annotation
    • http://lixuzixewufixib.66ghz.com/29637930045.pdfIn PDF document text
    • https://wubudonujekud.weebly.com/uploads/1/3/4/5/134524452/d56e162acbc9.pdfIn PDF document text
    • https://xobalodag.weebly.com/uploads/1/3/0/7/130739625/pilerofesoliv_nafuxonaguxudug_zupekibowib.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/86d72fc8.pdfIn PDF document text
    • https://pejivepomut.weebly.com/uploads/1/3/5/3/135339444/jomatunojupa.pdfIn PDF document text
    • http://wurogutevifo.iblogger.org/all_of_me_violin_sheet_music_musescore.pdfIn PDF document text
    • https://zufikuwokuz.weebly.com/uploads/1/3/4/5/134522796/7590260.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sefeluxezilire.epizy.com/60744956039.pdfIn PDF document text
    • http://radavukekugam.epizy.com/2561241517.pdfIn PDF document text
    • http://pozibeborajifo.epizy.com/charles_e_bressler_literary_criticism.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/crs_classification_reporting_financial_institution.pdfIn PDF document text
    • http://rijogutigoxek.epizy.com/chrono_trigger_snes_strategy_guide.pdfIn PDF document text
    • http://kuwukazisopof.rf.gd/autophagosome_formation_core_machinery_and_adaptations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0a8933-a262-405f-b131-a073c0b304ea/bupitematebomikopaben.pdfIn PDF document text
    • http://nidawumatori.rf.gd/nunup.pdfIn PDF document text
    • http://fusuzuveraku.epizy.com/17427160114.pdfIn PDF document text
    • http://pidawuz.epizy.com/chief_clinical_information_officer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/what_time_does_the_new_york_stock_exchange_open_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55ff51f-df7d-4335-a376-5641df13a585/microsoft_xbox_one_lunar_white_wireless_controller_only_at_gamestop.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/podavumokulaferize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a30f812-5355-43b0-8947-c80430095109/how_to_change_color_on_p_touch_label_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/creative_cv_examples_template_free.pdfIn PDF document text
    • http://gaxilikezore.rf.gd/i_need_you_lord_right_now_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/lekoxiwirixad.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_off0000f514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF514 5456 bytes
SHA-256: 5c14c80cb79e70a80aa7c3f0c603df16bb63b618481056fa7cdd45aae4bc4544
font_01_sfnt_off0001079d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1079D 11668 bytes
SHA-256: 059ca0bb796f5c96b4a9a89d9a3a5446c730fd976c4dff69f78dc518da14ee6a

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