Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ee94ec14b3688d…

MALICIOUS

PDF

76.4 KB Created: 2021-06-13 02:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3442eaa8830af15bfcda66d0735f2cf8 SHA-1: e1d451d3e1e1c94792b9da661a5c70d682dd7f38 SHA-256: 94ee94ec14b3688d2efda429284344292977450ef3476376569675c18693e5a5
186 Risk Score

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 0.9993

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://crysiq.ru/pbw?utm_term=yu+gi+oh+goat+format+banlist PDF link annotation
    • https://lewugudufe.weebly.com/uploads/1/3/4/6/134668986/xazefu.pdfIn PDF document text
    • https://bozuzagon.weebly.com/uploads/1/3/4/6/134666742/5375809.pdfIn PDF document text
    • https://vefupidukubimaz.weebly.com/uploads/1/3/4/5/134597042/4342256.pdfIn PDF document text
    • https://liguroxuf.weebly.com/uploads/1/3/4/4/134443360/gilutulerofojopelup.pdfIn PDF document text
    • https://babixedijifaz.weebly.com/uploads/1/3/5/3/135385025/bujavobedujugonavov.pdfIn PDF document text
    • https://jeluzaxevazax.weebly.com/uploads/1/3/4/8/134889688/purativezavez.pdfIn PDF document text
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/fipalo.pdfIn PDF document text
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/juzebujoxusanef.pdfIn PDF document text
    • https://poxanopa.weebly.com/uploads/1/3/4/3/134380657/23603.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/3af0ca8e-c720-43b5-9563-dcf98fd95d3c/luzaxekuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3878c32-70b2-457e-b25b-42f3f8b14ab1/xesupivigapufowizanidujum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f63a9378-b4c8-43d9-8f49-4ffcef8b20cf/holy_quran_software_download_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f569f2f-5fdc-45da-bb15-782d0d2fd237/liwizesatekimoresewago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8712f66c-565d-41b4-b105-41027c8699e2/75682922266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4fe970f-b962-4ffe-8c86-bee05f326ff8/61807477144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a7ed33f-e474-4cc3-b559-a95c438da9be/solution_set_calculator_with_steps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d88fc3-726f-43e1-bc01-5df980dc6623/can_you_sell_property_in_monopoly_to_bank.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11472c3-970d-48ba-83ed-f8cad76c3ae6/moluxejekomajidedomin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18d3e64f-e7ee-4f72-955c-483e9fd871de/lavusunivefewaba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19839047-f58f-4bc9-a245-30f50ae8ffba/juwuvedabuxenivimokuvak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad3af29a-5484-496d-9031-e60793a19e29/tazesabudumajeludebadib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08800efe-5173-479d-87dc-b98646855afb/vevajapafobonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a27f82-b82e-4ada-8690-2abc80506714/what_does_the_term_bardo_meaning.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_off0000ee01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE01 5280 bytes
SHA-256: 564aaf1e6f5ad3070bc7411ea2ecba89419eda207fa8d0310486d5a93ee84cd3
font_01_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10708 bytes
SHA-256: 6ecbecfb954a3d4bd758f86358a4d4de0b795843a718772fe4b70f50e9422572