Malicious PDF — malware analysis report

Static analysis result for SHA-256 82e872246a75c9b5…

MALICIOUS

PDF

72.7 KB Created: 2021-02-15 04:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 0757ee97906480100f01ab7b6acc0471 SHA-1: 19bfd787f8d9cb7dc0b254f6cc9ee69af0a74340 SHA-256: 82e872246a75c9b519453badf4aaf8c71f45f57314f82b5e86b8a88d5838070f
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=leupold+mark+4+lr%252Ft+4.5-14x50mm+review In PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_5fc7afe408508.pdfIn PDF document text
    • https://cdn.sqhk.co/delojiwuguj/jeujegh/22762631975.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/nowiwamarijulesune.pdfIn PDF document text
    • http://sell-toclick.online/animal_kingdom_class_9_notesu6ji9.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/vusiben.pdfIn PDF document text
    • https://wimugedi.weebly.com/uploads/1/3/4/7/134725841/suzizusibawuzoxafoj.pdfIn PDF document text
    • http://wirodapupoz.iblogger.org/vacation_request_form_template.pdfIn PDF document text
    • https://cdn.sqhk.co/jigugabopu/jggjgia/tachyon_rods_uk.pdfIn PDF document text
    • http://logunej.iblogger.org/pulojobewomodebisogenu.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/fKYjezE/17598817567.pdfIn PDF document text
    • https://ponefapu.weebly.com/uploads/1/3/1/6/131637257/8614216.pdfIn PDF document text
    • http://tur8osale.site/706958323897v0jw.pdfIn PDF document text
    • https://cdn.sqhk.co/wukomidekepu/JwAighb/burugovonizuwer.pdfIn PDF document text
    • http://ompala.store/chuyn_ui_sang_jpg_online0lsaj.pdfIn PDF document text
    • http://ihsteam.ru/determinacion_del_punto_isoelectrico_de_aminoacidoskb7pp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://norilonabu.epizy.com/corellian_conflict_rules.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_off0000de13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE13 5656 bytes
SHA-256: df673bfcc8ffa10c4a3a2e34478415f0ac250d59ae5a4e311c95cfac5aa2db98
font_01_sfnt_off0000f172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF172 10504 bytes
SHA-256: dc9722a4feaf799dd697255ac8d5f91f4bfecd00137c9d1c8168aa45ba061f6a

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