Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af0e8f6e08aaecf…

MALICIOUS

PDF

77.8 KB Created: 2021-04-03 13:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04597015c8ece376fdd63f68c0b62376 SHA-1: 21799f5ef3e49c23c2ff04875b67110a66c21146 SHA-256: 7af0e8f6e08aaecf4391a15c72fd0f688633bea32f0afe269e748d9e26b9e809
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document is identified as malicious by an ML classifier and contains numerous embedded URLs, many of which point to link farms hosted on disposable domains. The document body, though heavily obfuscated, suggests a lure related to 'geometry test answers', likely intended to trick users into clicking malicious links. The presence of external URIs and link farm heuristics indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=geometry+test+1+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379231/normal_6023e37441b17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448115/normal_5fe872d8bbc71.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/85292416734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487186/normal_600ce8bc59880.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_601f33c4d834c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478968/normal_5ffd537092eba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459640/normal_5fdf6579b4ffb.pdfIn PDF document text
    • http://wapiwikitob.iblogger.org/how_does_a_mr_coffee_espresso_machine_work.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376850/normal_5ff5b641c614b.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/a21c09bc-f3d3-4e8e-bff6-3a68ceeb89f0/duracell_battery_charger_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e07e4d8d-9f5c-4695-98b9-45611d2ddaef/getigukakugog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d59d9057-f455-4f0a-82b6-fc57ceb23f86/philips_norelco_series_7000_shaver.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/spring_framework_reference_documentation_4._3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c53b62c-02ff-4644-b8cb-2061bbe39e37/89726214715.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cde1052f-2d5f-46c7-b19a-470239fa6a9d/76317643278.pdfIn PDF document text
    • http://lobosenus.epizy.com/10318231999.pdfIn PDF document text
    • http://jegozejixal.epizy.com/seores_del_narco_gratis.pdfIn PDF document text
    • http://vaxalisuj.rf.gd/fexoso.pdfIn PDF document text
    • http://ditanumugagoma.myartsonline.com/jboss_application_server_tutorial_download.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 5076 bytes
SHA-256: 04d487ba1c5132f2b22b087802ca9ff1b3ba9aac6dc544d18fdfe30c0247d4ef
font_01_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 11528 bytes
SHA-256: c0c9c66ecbb8161e647d376dcda0b58f671c8dbbf362bd02badcaf59916b97f9

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