Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae4e5b979a5fc100…

MALICIOUS

PDF

69.5 KB Created: 2021-02-19 10:11:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7d86c0b9a0218381e7b5f2f4b9117dc7 SHA-1: 7d45af83af421353985ef307bd2f48c379da723d SHA-256: ae4e5b979a5fc100b8f891bef9a97d8543dba17abba2f1a71a6397fb401b9ab5
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wb?keyword=how%20to%20write%20an%20executive%20summary%20scientific%20paper PDF link annotation
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/nepowaguxufidid.pdfIn PDF document text
    • https://judozonax.weebly.com/uploads/1/3/1/4/131454501/803908.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/luvokigonosazesumilalip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490133/normal_601ae02a9dc75.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/7420940.pdfIn PDF document text
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/gutelu.pdfIn PDF document text
    • https://muwewemumefiga.weebly.com/uploads/1/3/0/8/130874681/2608029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_6011562b6f874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374689/normal_601ec6e4270db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rupiroliwon.epizy.com/android_get_assets_uri.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/epidemiologia_teoria_e_prtica_pereira.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/asbestosis_enfermedad_profesional.pdfIn PDF document text
    • http://kotorewijog.epizy.com/angry_birds_go_hack_apk_2014.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/functions_and_relations_worksheet_pre_algebra.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/sql_server_2017_reporting_services.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_off0000d4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B7 5412 bytes
SHA-256: 585439862f136fe5294e1e229fcf991cdef15865c25ad02f51a510bae7115850
font_01_sfnt_off0000e727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE727 9876 bytes
SHA-256: 98223c38257f1dd2987a37a9badfe28af2d9beb4560e8a6bc69425f8380384b5