Malicious PDF — malware analysis report

Static analysis result for SHA-256 897903c6f854bd8e…

MALICIOUS

PDF

78.4 KB Created: 2021-04-19 13:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9563a07982293d744fe5882c480fc20 SHA-1: 5d2262ab1f865e847a359737810bfd581e56bdff SHA-256: 897903c6f854bd8e6996746328b8306dd3d91f55aec90d44945da40554ec2b19
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded URLs pointing to various domains, many of which are flagged as disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://botokaw.ru/strik?utm_term=what+is+enlightenment+in+simple+terms PDF link annotation
    • https://cdn.sqhk.co/lanumakefu/gflhehf/gapijezedolutafefad.pdfIn PDF document text
    • http://extrameets.fun/rsmeans_2014_freehb20s.pdfIn PDF document text
    • http://bcpzon4segurabetaviabcp.com/dabixoluzipn9dgq.pdfIn PDF document text
    • https://cdn.sqhk.co/wumigapinido/eEnEPji/51261238288.pdfIn PDF document text
    • http://italywow.info/best_way_to_cook_king_boleteuldwu.pdfIn PDF document text
    • http://jobs-ingenieur.best/majitutegesam475r.pdfIn PDF document text
    • https://cdn.sqhk.co/tasiteregixo/cJjeoib/most_free_kick_goals_list.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/ig8hbLa/61735773142.pdfIn PDF document text
    • http://idealslim-ordina.site/bobakebekiposoxibuzuwijuoq832.pdfIn PDF document text
    • http://legendnat.space/recogida_de_basura_bloomfield_njmxf5a.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/eUkmbZj/luke_bryan_songs_youtube_playlist.pdfIn PDF document text
    • http://popularchoice.space/the_princess_bride_movie_moviescounterwmr2d.pdfIn PDF document text
    • http://sovetnik53.ru/rusowdtyru.pdfIn PDF document text
    • http://familyit.pro/arterial_blood_gas_test_meaning9k2gr.pdfIn PDF document text
    • http://meblik.su/reading_order_of_sarah_j_maas_booksshc5o.pdfIn PDF document text
    • http://gilopiporu.iblogger.org/atul_maheshwari_exam_book_download.pdfIn PDF document text
    • http://zoomita.space/30393357060ipi5y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/575b21d9-0aa7-489f-b893-2315ff3919f9/47744043821.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5abf3ad0-6ef6-47b5-9760-14fc0c918085/bobagopedikirijaxogu.pdfIn PDF document text
    • http://popebifuvus.epizy.com/dorama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be07dbe-405c-4a9f-a4ff-ef6f5bb82b72/which_harvest_festival_is_celebrated_in_punjab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2266b075-dfd3-442b-9247-b523ad00c947/31441836560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a29caae9-b08b-4d81-8b94-90d7855dfb26/is_milorganite_toxic_to_dogs.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_off0000f90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 5248 bytes
SHA-256: f0067ae7802a1d4e0b6299e4d5892436e71b7cc681772931e10461fbf857eae0
font_01_sfnt_off00010ac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC5 9772 bytes
SHA-256: 7dccc6a2cd7aeeb56526a1cb2ff6057f2bbf369e4083f3ce175964d7d6d43cc7

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