Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0276be7e011fb58…

MALICIOUS

PDF

77.1 KB Created: 2021-04-11 00:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c7fb84f88736dda5fbe9b549af02f158 SHA-1: f4f5f5c7f92bf6a043627698b5ca55f785197916 SHA-256: e0276be7e011fb58bbff3528cefb801049cd9ec22c9f8b0f9718c37a52609ced
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://seumenha.ru/strik?utm_term=incomplete+metamorphosis+meaning+in+english PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369309/normal_603348332bdc1.pdfIn PDF document text
    • http://islta.fun/how_to_write_for_chicken_soup_for_the_soulgm7e3.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/hcQjjs0/56591463411.pdfIn PDF document text
    • http://bidujukasegopu.22web.org/woxoletazakanidob.pdfIn PDF document text
    • http://verifiedbadges-form.com/how_to_clear_jam_in_fellowes_shredder2qbnz.pdfIn PDF document text
    • http://italysummer.space/887859039461fzex.pdfIn PDF document text
    • https://cdn.sqhk.co/jopubelo/hgdBoGI/bujetirifakonojesegof.pdfIn PDF document text
    • http://kreativoblako.com/56198185943wq58c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5fd0dc43c3e1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_606b47780a49f.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/trastorno_alimentario.pdfIn PDF document text
    • https://cdn.sqhk.co/gojapawareke/idii5rs/lonodenofononulitoxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443595/normal_604cbb6ed106b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385634/normal_5fd63b186ab3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mogivinisisa.epizy.com/barcarolle_mendelssohn.pdfIn PDF document text
    • https://34184745-b1ec-4725-b105-60c94cc90871.filesusr.com/ugd/63369f_3571ef6ab6e64f06847ed16b2884effd.pdf?index=trueIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_2d1fceb0e6f040618772cf14bc658a40.pdf?index=trueIn PDF document text
    • http://levowemorunob.epizy.com/tiziposanexogopinotose.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/marketing_strategy_definition.pdfIn PDF document text
    • http://gakajitaju.atwebpages.com/organic_chemistry_definition_and_examples.pdfIn PDF document text
    • http://demiwadipojaz.epizy.com/pobivofi.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_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 5284 bytes
SHA-256: 782f918d7faab9a8c19a4770d6e619b4458ecc7672bb12588a117913d40a24ca
font_01_sfnt_off0000fc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC84 12172 bytes
SHA-256: 118657307c04953c14bca080f771e5a4a281c6e83ef515a2b11eb224570d1df3

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