Malicious PDF — malware analysis report

Static analysis result for SHA-256 89a1413c4b7e5d3f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-28 13:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e93d916d50e4784ba29fbc472341004f SHA-1: 5ac5f8ca48938277cf634110bcfb3542227a3331 SHA-256: 89a1413c4b7e5d3f23fceb1ca8354ad7dd22a9e317278c2947d5112286f6b58b
126 Risk Score

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 0.9991

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://botokaw.ru/123?utm_term=gelatin+powder+vs+gelatin+sheets PDF link annotation
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/5126182.pdfIn PDF document text
    • https://tadizusojad.weebly.com/uploads/1/3/2/7/132712436/2981665.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/4024067.pdfIn PDF document text
    • https://wojozumokibenap.weebly.com/uploads/1/3/4/0/134097994/e117fda43.pdfIn PDF document text
    • https://vejesare.weebly.com/uploads/1/3/4/4/134493146/loveg.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/jetupemafepipis.pdfIn PDF document text
    • http://fufirewavit.getenjoyment.net/buku_ashabul_kahfi.pdfIn PDF document text
    • https://sonanibiforopo.weebly.com/uploads/1/3/2/7/132710732/fabepiti.pdfIn PDF document text
    • https://radiduma.weebly.com/uploads/1/3/4/3/134362755/4383875.pdfIn PDF document text
    • https://guxedujigizos.weebly.com/uploads/1/3/4/7/134735137/bukudoxoki.pdfIn PDF document text
    • http://zowisofefo.iblogger.org/januf.pdfIn PDF document text
    • http://xelapelumu.iblogger.org/fodezogemop.pdfIn PDF document text
    • https://goluluvofa.weebly.com/uploads/1/3/2/7/132712214/19aa40f4615fcc5.pdfIn PDF document text
    • http://xutexukoxobofi.mywebcommunity.org/how_to_clean_a_broan_range_hood_filter.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/35704615408.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/33321715678.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/alteryx_certification_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1342aa81-8d82-4ea4-860c-f270f291a429/bapevi.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/23004744659.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/36765659494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f33f69a-2cec-4d5e-bcc0-98784ddf1a6d/how_to_fix_a_nintendo_dsi.pdfIn PDF document text
    • http://girifej.epizy.com/is_kaplan_cars_harder_than_aamc.pdfIn PDF document text
    • http://jotavuwejopilo.rf.gd/hyperlipidemia_dietary_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e910daed-84b3-477f-8bf2-b4fc295fca1a/what_are_the_elements_of_relationship_marketing.pdfIn PDF document text
    • http://netozovozuze.rf.gd/bibliotheca_universalis_gesner.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_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 5404 bytes
SHA-256: e26e2c219b6e339890bcd5bf85433a6e4a80a5545ee78283ecfe32b9fa55555b
font_01_sfnt_off0000f548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF548 11268 bytes
SHA-256: a5f8ea2431dbfeeed2790d4d3c320920377c3710d87c87ae947ce975490120e5