Malicious PDF — malware analysis report

Static analysis result for SHA-256 696769847589247b…

MALICIOUS

PDF

76.3 KB Created: 2021-05-01 04:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c3e7720fb39a725916a7a3fc8ba29fea SHA-1: b35eda50bada5b01883dee4205685723ac3fda76 SHA-256: 696769847589247bb16e4b5a965f875d4d9b7154d7aa2ba924d0d5ebcd47952f
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 0.9997

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 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://lozipotod.ru/strik?utm_term=yamaha+rx-v373+4k+passthrough PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5ff50e1e96c47.pdfIn PDF document text
    • https://cdn.sqhk.co/pikikunifav/p39BzJh/lewexewovujenenexoz.pdfIn PDF document text
    • http://zitukuwekoba.sportsontheweb.net/kokalarufogonunen.pdfIn PDF document text
    • http://boriroxoxejava.mypressonline.com/difference_between_system_software_and_application_software_in_points.pdfIn PDF document text
    • http://sosuziba.mypressonline.com/pdf_text_editing_software_free_download.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/zumirubujobuvikipi.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/huz9ihB/85566254485.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/84234262218.pdfIn PDF document text
    • http://gagefiwirimat.medianewsonline.com/atbu_admission_list_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_600cbc2460fd9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496816/normal_5fe66b6866384.pdfIn PDF document text
    • http://navevukosuso.mypressonline.com/how_do_you_describe_sales_assistant_on_resume.pdfIn PDF document text
    • http://neletaparufo.scienceontheweb.net/mebowevixo.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/PAhd4gd/large_button_cell_phones_for_seniors_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozidijapepore.atwebpages.com/que_es_placenta_accreta.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/pathfinder_2nd_edition_core_rulebook_free_download.pdfIn PDF document text
    • http://riveminigokoxa.myartsonline.com/juxerutafipom.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/emerson_the_american_scholar_summary.pdfIn PDF document text
    • http://wekiwuja.rf.gd/1680225166.pdfIn PDF document text
    • http://bajewilogofiro.epizy.com/89018094385.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_off0000e71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71F 5720 bytes
SHA-256: ac4501c319b0f753810f62c43f69e4689044a97b79177c4721383432789c6f50
font_01_sfnt_off0000fa8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8F 11728 bytes
SHA-256: 54e0cf5edc02c4e03544a3ce48030d67f70fcfd10a44c63786b9e5c29ef43e51

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