Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8c1475e49a8a739…

MALICIOUS

PDF

96.8 KB Created: 2021-03-26 08:15:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3eb9cbfbebc791eb19ea09dae8876fb5 SHA-1: 295f56bb84db32a93129b22cf55a890e2f743545 SHA-256: f8c1475e49a8a739363effc91a5a1d99627720e81c4bab641c9c2bcb99887ffa
66 Risk Score

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 hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://nipisod.ru/strik?utm_term=the+house+of+spirits+chapter+4+summary PDF link annotation
    • https://cdn.sqhk.co/lituxopevuk/ige5Rhb/7453182291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500446/normal_604ace041f7fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_6052f0cd011a5.pdfIn PDF document text
    • http://xaninivinekeni.iblogger.org/simple_subject_and_complete_predicate_worksheets.pdfIn PDF document text
    • http://buvalopexur.mygamesonline.org/pisopo.pdfIn PDF document text
    • https://cdn.sqhk.co/wufaluvete/gjNiehg/app_para_traducir_idiomas_por_voz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ffb6f82bf6cc.pdfIn PDF document text
    • http://vunipofuwaz.22web.org/aqeedah_wasitiyyah_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366622/normal_5fd26b8e34f43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fozovevozasox.epizy.com/tajavatilobipepevuvane.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ad6afcb-7e93-430c-b128-5a848eb3373a/the_looking_glass_wars_book_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6c4160e-4e19-486a-97a4-5413e1ef375a/diwazopegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3155db09-7397-4772-8879-21eff4529e9c/what_is_subnet_mask_and_why_it_is_used.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/xenasakubojafoxodaxugizi.pdfIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/68025668658.pdfIn PDF document text
    • https://9049409e-dcbb-43fe-b7cb-0f7a5d042cf1.filesusr.com/ugd/e59eee_d3d8db23529449c59ef25aea7dbe77f7.pdf?index=trueIn PDF document text
    • https://6c9aa500-f8d9-42a6-b8a4-5b3c562bbfc3.filesusr.com/ugd/543886_d682de78bc8545ba9dc576aa98bc4ee1.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_76c13b5af64c499f820e8eb1b8deb8a9.pdf?index=trueIn PDF document text
    • http://wiwosotu.myartsonline.com/virubebedotokuwojilu.pdfIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_7463e1c66c68420b8dac42f7c12b69bd.pdf?index=trueIn PDF document text
    • http://karajifaderiwow.epizy.com/nikigowekuporejum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcd1e7fe-c662-4b91-82f8-0f03a05702f7/powinidukikuwozilewu.pdfIn PDF document text
    • http://luselobek.epizy.com/shutterstock_er_no_watermark.pdfIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_cd9656da5d80489e9d79699c511956e6.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C38 5140 bytes
SHA-256: 08cf25335ca84646024d7da324f259ba58e1589a2efc3e3eb351682ea50efd05
font_01_sfnt_off00013dcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DCC 11748 bytes
SHA-256: 36dfeda9c1bc57004adefa687c119be4a8964e6b1ccc401388249eef69b26eba
font_02_sfnt_off00016540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16540 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230