Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ba7af3f0f03a0d…

MALICIOUS

PDF

76.8 KB Created: 2021-05-29 09:44:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 270ac99bc826e7635d578ae65953c60a SHA-1: 5441499b64a760e8b284c7be36d733f938f6ce7a SHA-256: e6ba7af3f0f03a0d9be77465f8f6f925df5f61bf20d58038ca7144ed88c91086
156 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 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 0.9997

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 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.
  • 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://jottigo.ru/strik?utm_term=how+to+write+standardised+instructions PDF link annotation
    • https://mitojebani.weebly.com/uploads/1/3/2/7/132711961/zekalu_pupozi_popajizife_mixidudupim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480584/normal_6036f8a325764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_6037269a6340e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530171/normal_6044f5c337595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450502/normal_601bcfd1c0435.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383460/normal_602c69846a886.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/repawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_6014316e402cf.pdfIn PDF document text
    • https://xakijukozuxa.weebly.com/uploads/1/3/7/5/137503217/f085441c93a6408.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/2034542.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463554/normal_604b067ab2025.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/31f9d4af-7b0c-43a1-9382-cd4bee2e8e14/fly_fishing_outfitters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b95f861-2d2a-46fe-912e-13945ea3cfc7/gerofobel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd0fa643-762f-4d82-a516-39d636b6206d/mutosotidosex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e410c0dc-d6c8-414b-b4b1-a9566cbee9f3/esl_conversation_online_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15d89f95-61c8-4eb5-9455-c0790472bd39/tica_para_amador_resumen_captulo_1_al_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402bcfc5-61dc-472d-a86d-ecd5f824fe22/lady_midnight_minneapolis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669f1500-be84-48f4-90f7-49d1cd1492c7/62477091743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43733736-8517-4799-8d29-daeec3c97fca/formato_para_hacer_una_empresa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1052db-d4e0-492d-8ac9-2ba57f44f806/julom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a42beb6-6c41-47d0-bb75-acf91eb938d0/modern_oromo_names.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_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 4956 bytes
SHA-256: 20ea4d56bb45394c31d73268342d2f450526fca4ffb6d93c3dbea2545d5e9d88
font_01_sfnt_off0000fe56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 12132 bytes
SHA-256: be286d863584302fcd49a50d520f530dcef9e474cfc71b90ff55191eb7981100

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