Malicious PDF — malware analysis report

Static analysis result for SHA-256 fadbb316c99e0a22…

MALICIOUS

PDF

75.9 KB Created: 2021-04-03 19:40:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8109914faa14ffa1d6191086932e4991 SHA-1: be25e53ad24c7e91ea0077ae8509b544958e069e SHA-256: fadbb316c99e0a22a7db8f0c089dba04814ec54bc898d91782cb8906a0d66c50
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains numerous embedded links, many pointing to disposable hosting and utilizing UTM parameters. This suggests a campaign designed to redirect users to potentially malicious sites, likely for phishing or spam distribution. No scripts were extracted, limiting the analysis of specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=is+ch3cooh+a+strong+acid PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469355/normal_602456649b557.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447497/normal_605f2cd5110cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379053/normal_5ff6bdc1deb05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427514/normal_5ff9ed7c1c660.pdfIn PDF document text
    • http://xovijezup.mywebcommunity.org/ketiregadid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450351/normal_6019ce1414783.pdfIn PDF document text
    • http://latencfsrt.space/which_smart_thermostat_does_not_need_a_c_wirec3as0.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/fozesata.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/winninghams_critical_thinking_cases_in_nursing_solutionsa6z7p.pdfIn PDF document text
    • http://zagozogenef.sportsontheweb.net/64551438354.pdfIn PDF document text
    • http://xajavawinereko.mywebcommunity.org/48775350634.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nipanalex.epizy.com/algorithm_sorting.pdfIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_70de3ea57bd84d95b2041dc00a5393c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/97469221757.pdfIn PDF document text
    • http://davivizuvazofa.rf.gd/personal_blog_template_for_blogger.pdfIn PDF document text
    • https://9d3edb37-11ce-4d87-b861-4f8d850d55a0.filesusr.com/ugd/0d2aa0_429865d1ffaa465ca9f9574078cf74a7.pdf?index=trueIn PDF document text
    • https://e1bd05e7-a2ed-43df-b5fc-9bc8ee0b1a84.filesusr.com/ugd/08acf3_aa04c0c573264a4d8bb6ce6f29a7a9c8.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_d23452cd3c0f41c299978a28c92cc23e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/pennywise_true_form_novel.pdfIn PDF document text
    • http://zitipibozag.rf.gd/elaboracion_de_barras_energeticas_de_quinua.pdfIn PDF document text
    • http://wigazimo.epizy.com/guardian_angel_pictures_free.pdfIn PDF document text
    • http://texegap.epizy.com/anecdotal_information_childcare.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_off0000eb51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB51 5272 bytes
SHA-256: 6a6aad3ee8c3f4f3036e2825a99e2a814703dcf06c8ad669db1507776a030530
font_01_sfnt_off0000fd33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD33 10972 bytes
SHA-256: ccbcf526fd4cb5af30026f881282b71fb20ff071811e3e021841d12e937e736d

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