Malicious PDF — malware analysis report

Static analysis result for SHA-256 752a61218381e9fd…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 07:25:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b8c482e02035610ca49511ed3a01cbd0 SHA-1: dc08eb7575b8e6434344b08996423ef749acee99 SHA-256: 752a61218381e9fd192b340b2bc5218c2a79983c587f8ca9b2eb6f8ed98af196
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://soxebez.ru/award?keyword=model+700+action+screw+size.
  • 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://soxebez.ru/award?keyword=model+700+action+screw+size PDF link annotation
    • https://cdn.sqhk.co/joxonorapa/W9ljbe8/dakopaxadikobi.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/guguxidaruwo.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/nRibH6z/vevakugudurewir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455380/normal_5ff40f658c848.pdfIn PDF document text
    • http://baliferifopiz.mypressonline.com/lg_washing_machine_top_load_filter_cleaning.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/zulezurodifinu.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/hgxicgh/32498309421.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/where_is_the_lint_trap_on_a_front_load_dryer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijadogif.atwebpages.com/remington_pg6025_parts.pdfIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/wj-iv_achievement_subtest_descriptions.pdfIn PDF document text
    • http://jumepenitujox.atwebpages.com/xavivokuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/31724321377.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_off0000dfa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA2 5304 bytes
SHA-256: 4f97e50a465f857d7a0e5426bbfe79e889dcf3fd7d6bbf49391e4af407485795
font_01_sfnt_off0000f1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 10364 bytes
SHA-256: 5d7d063ad45f10fafff440864c42cf9a2cd5fdde4625b8336f0e54bcb92a3140