Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6efb0b348cd46a…

MALICIOUS

PDF

80.1 KB Created: 2021-04-16 06:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8395aa58a00502d2bc6afbdbca0534eb SHA-1: 2da2e257484675756047ed784b2a95dd68cc38ce SHA-256: 9d6efb0b348cd46a78729e5b66c3d46c272735d0f1f647c35a004b26ef2f031a
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 0.9994

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://lozipotod.ru/strik?utm_term=yoga+cards+for+kids PDF link annotation
    • http://2gusevshop.space/analytical_reasoning_questions_and_answers_for_ntsuo7bq.pdfIn PDF document text
    • http://winoorama.space/android_app_development_free_course_with_certificate1dn21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482403/normal_6032f27ca7c6b.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/kevarogulotdpkck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_60665c0be2b88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494648/normal_5fc5b48f85580.pdfIn PDF document text
    • http://eurofamily.pro/napomake4ck83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485569/normal_601834953cb51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://679cd94f-bb1f-411a-9684-d99498fe93d6.filesusr.com/ugd/ce16d4_9bf92ff0f5354c13bcbb1f8f6cab4b2a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/doxifuba/why_no_more_black_books_in_the_bible.pdfIn PDF document text
    • https://12a3aa02-022d-4218-8efb-90aa4388683d.filesusr.com/ugd/6dfd9b_979487d9259847eaad61d4122e066acc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/72476998196.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/benixawodatomajuwoga.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/polupujeziresudibika.pdfIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_5ebfd06e9c71442796fbc843b7f1b0be.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/58850340455.pdfIn PDF document text
    • https://0c43c058-97b3-435a-b041-a9f001bfa883.filesusr.com/ugd/791d74_6df8010d8a7d4f48b9f3c77cf8ad1c34.pdf?index=trueIn PDF document text
    • https://88211235-bf86-4d40-a6ec-a052db2f682e.filesusr.com/ugd/94e5ef_a0967d6dacca4128a7216e65316f33d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/winumigutam/the_one_kiera_cass_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/handwriting_worksheets_generator.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_b30f6fe1b47a40e881f83db080a272e8.pdf?index=trueIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_56326db7e826433a851cec9a46b0daab.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_9f6d4a3c338140c7aea67afdef24398a.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_off0000f9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A2 5184 bytes
SHA-256: e808e3b2bf2da6207c7af51c4de30c9ab52790d1394a4d20f57e63dbe658866b
font_01_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 11684 bytes
SHA-256: 619de76d899d519b6f36df429d6389d199634e16e115c009f63c240a65cc51f4

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