Malicious PDF — malware analysis report

Static analysis result for SHA-256 247b58667f839584…

MALICIOUS

PDF

76.3 KB Created: 2021-03-22 03:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 07d243f86ea5025c43aee59028153644 SHA-1: cd422f19e80b9f30fc62ce750208e949337384b0 SHA-256: 247b58667f839584704bb2e887ae06f161d0576fa2e6feee4d3f021854393110
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/strik?utm_term=how+to+run+a+debate+in+middle+school PDF link annotation
    • https://gafewifem.weebly.com/uploads/1/3/1/3/131379815/02581fe.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/dhbhjoM/how_to_save_boomerang_from_instagram_message.pdfIn PDF document text
    • http://xtw2.club/19727200393okcgh.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/gdiiKjh/embedded_linux_interview_questions_and_answers.pdfIn PDF document text
    • https://lirurofimel.weebly.com/uploads/1/3/6/0/136088330/8c32e9f9a22.pdfIn PDF document text
    • https://fuxogadukuka.weebly.com/uploads/1/3/4/6/134688721/toravibefaz.pdfIn PDF document text
    • http://kmikaerfs.ru/how_to_clean_tappan_stove_topr83by.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/lawunupeme-fisibidekuko-wuvefodojesalaf-mozowel.pdfIn PDF document text
    • https://zisupozukubowad.weebly.com/uploads/1/3/4/6/134678668/7b724a897.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/giscieD/titurodedefogetivogimira.pdfIn PDF document text
    • http://servicesforsupport.com/645937182904mjdi.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/NXaAaje/gmx_cloud_app_download.pdfIn PDF document text
    • http://grizhoff.ru/suzuki_sidekick_off_road_partsvzt7e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzanuziti.myartsonline.com/wexulenulun.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_51dc6ae61f49454d9e0929d9c3ab7fff.pdf?index=trueIn PDF document text
    • http://gevapugono.atwebpages.com/the_ancestor_s_tale_richard_dawkins.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/dexeluwijisuz.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_40fd16e65fde41878015dd1e3cb854e5.pdf?index=trueIn PDF document text
    • http://nejesezape.myartsonline.com/pizepidatovemuzozobasokug.pdfIn PDF document text
    • http://kapowuxivi.atwebpages.com/wevaxebimudefotos.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_766fa9be5f424f08927b3c64e8b25865.pdf?index=trueIn 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_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 5372 bytes
SHA-256: 42ae12823e9729f5a9c3928f0fb7a56206d634292e7085cdf9a79552738404f7
font_01_sfnt_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 10516 bytes
SHA-256: 4ce847ee912aefb92eeb2a2e0e4ffadf2ad6fd20f2e0452d3ef35ce0752c13e6

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