Malicious PDF — malware analysis report

Static analysis result for SHA-256 9380c5219578ce3f…

MALICIOUS

PDF

81.7 KB Created: 2021-04-03 23:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7ac0ce8a330da2d3c0f9ec1cfbc8a280 SHA-1: 06486d6670fa47c9202401393050c1cadd0e833a SHA-256: 9380c5219578ce3f57ef8d90ac594ddac3e870097d52601ba2e3cef3615fa3aa
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 0.9995

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://dafemum.ru/123?utm_term=free+trade+agreement+meaning+pdf PDF link annotation
    • http://muzhskoizhurnal.ru/dogavobozusebi9xgg0.pdfIn PDF document text
    • http://speak4pro.com/mejetusukikegedenelatelopqopk.pdfIn PDF document text
    • http://teksalle.xyz/53172395543ubv4l.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/55208427318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fe652feebf30.pdfIn PDF document text
    • http://tibetterrier.ru/95246819551aup14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380073/normal_5ff75596ab611.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/atkins_principios_da_quimica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5fd23a8c89a81.pdfIn PDF document text
    • http://puvinizozibejir.mygamesonline.org/wanesuzegofuferin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lawewil.atwebpages.com/25457357906.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390ce939-0f40-4f62-b2f5-c88d6da28699/how_to_use_excel_to_plot_line_graph.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a3ce71-b1eb-4e62-ad92-04f37d22326d/how_to_fix_a_maytag_dryer_that_wont_heat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550483a6-1f0a-411d-b090-79581c60041a/xefeva.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/medieval_2_total_war_mods_2020.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/13763636647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f192a3d3-22a5-4542-9f30-76bf2aee5564/63903033619.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/76780065524.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/how_to_recondition_a_dead_car_battery_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb764eec-acee-4be2-9cd9-6c42c9242a2c/redodozitatabenigexujuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208b65ce-a9ff-48f7-8f2d-c668211446f1/gugolomagesuxuxiwixuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f41db6-82be-490d-831b-1a062617dfde/zezizeguxixu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 4784 bytes
SHA-256: 4b2799ec842c43db26097226c554a9c765ea9f979759f0ff1dffb45926e74877
font_01_sfnt_off00010668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10668 10876 bytes
SHA-256: 3036cfc95479bd24a6c8bd317c8aa1c838f9762f0975a3622ab2548e6020b01b
font_02_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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