Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd04cfe03bae0d5…

MALICIOUS

PDF

73.8 KB Created: 2021-05-08 06:09:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5cac8c8fda3f3a68a9926640e47e5af6 SHA-1: e2c4bc7f5c46912e2ac1299971ba12edae42fa7b SHA-256: 6dd04cfe03bae0d5975c9dfc8d54b6e5f3188ae019e0f8f21b6cdc22e5a1ccea
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, many pointing to disposable domains, and is flagged by an ML classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to operating system types, likely intended to drive traffic to the primary malicious URL. No scripts were extracted, but the overall structure and URL distribution suggest a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=what+are+the+4+types+of+operating+system+in+computer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5fd26a32d81cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_6048e4fda6b35.pdfIn PDF document text
    • http://fikitenifazela.iblogger.org/15428136703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_6035873e574c6.pdfIn PDF document text
    • https://kanefudejezem.weebly.com/uploads/1/3/6/0/136056225/wozezamixasubuxaponi.pdfIn PDF document text
    • http://junemam.22web.org/adobe_reader_editor_software_free_download.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/rofixikupufitivosazeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383921/normal_605439e55d6b1.pdfIn PDF document text
    • https://tujulita.weebly.com/uploads/1/3/4/6/134687611/8065835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mopasumugenivev.rf.gd/apriori_algorithm_tutorialspoint.pdfIn PDF document text
    • https://f26e6bca-ce10-4524-9610-ed5ef7c8d48b.filesusr.com/ugd/ac8c68_ee0f4f156a1f447eb5fa0faab30604dd.pdf?index=trueIn PDF document text
    • https://949217f6-ecfc-4a1b-8806-967b2a145102.filesusr.com/ugd/b08fd2_4b51457a876740ba9ac11572887cac0a.pdf?index=trueIn PDF document text
    • http://fefekug.rf.gd/zobovirezinosowake.pdfIn PDF document text
    • http://dukanikurov.rf.gd/nikajamigebevasuzuli.pdfIn PDF document text
    • http://zuvaxazalafes.epizy.com/67676954140.pdfIn PDF document text
    • http://butorinowu.myartsonline.com/wizisokuliwovufiziwoma.pdfIn PDF document text
    • https://804b95bc-9ca4-448d-a094-5a8e1ff69a26.filesusr.com/ugd/99d1da_eda5d4b86e554b1187e9958775f59dde.pdf?index=trueIn PDF document text
    • http://famutiparuzot.epizy.com/class_11_chemistry_ncert_book_download_in_english.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_9a37064cb07e4026bef8df342b4a3613.pdf?index=trueIn PDF document text
    • http://fopatumupun.epizy.com/nefuv.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_off0000e235.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE235 5600 bytes
SHA-256: bfe1f3139e0aa5816d278e2022939d350141f6f74f2fbf5603544877e593ca97
font_01_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10544 bytes
SHA-256: 65f4fc593aa2a45d8ed5eaec655ac431bd50e5233e0717acf0147bc61ccf5760

Open this report in the interactive analyzer, or submit your own file for analysis.