Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e3b936f677282f…

MALICIOUS

PDF

87.6 KB Created: 2021-03-17 01:04:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ee6ae4574f2413b5640720ab52205523 SHA-1: 94811d3b1abeffcb776065b6873a6bc0986bd704 SHA-256: 85e3b936f677282fc82e40c6b893261bcd8ed48289a750dd9318a569fedf975e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/strik?utm_term=is+online+prostitution+legal+in+india PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373509/normal_60199dd62116a.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/dhahdjg/list_of_movie_maker_application.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ff382ca22d9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470832/normal_6006527403684.pdfIn PDF document text
    • https://cdn.sqhk.co/morovujefi/hs04BZI/georgia_guidestones_full_text.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/keurig_k10_mini_plus_brewing_system_white.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/ajdhgie/the_last_ninja_origin_lucky_gift_code.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/kuloraluxolowomobase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_6037ba6fdbc40.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/92541905489.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/gcw0jid/81854087556.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/wsYicgg/firebipovat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_603e0d7a56a43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/20734566527.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/webarchive_to_windows.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_32205ab134d74002906fd1b9ad90e17c.pdf?index=trueIn PDF document text
    • http://xowilewegiwo.myartsonline.com/3854831427.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/descargar_musica_gratis_para_celular.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_ef43234bd02240069e186d27bbb07442.pdf?index=trueIn PDF document text
    • http://dadusuxu.rf.gd/when_the_world_as_we_knew_it_ended_analysis.pdfIn PDF document text
    • http://dopelatov.epizy.com/gaxad.pdfIn PDF document text
    • http://zesodowiponuse.epizy.com/fubuku.pdfIn PDF document text
    • http://xefobimulekojuw.epizy.com/logaxizunobuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/28730460744.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_off00011a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A80 5064 bytes
SHA-256: 6ed4c909da7e750dab10ec26ec465a4b6c71b4d55998b4b6ec23230b4d6bfd96
font_01_sfnt_off00012bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC2 10784 bytes
SHA-256: 37db442c52ed77f2d6725df1038133049e776a43eb7caf8b7b5e81cfdaaede18

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