Malicious PDF — malware analysis report

Static analysis result for SHA-256 6338348ea0aa7f1e…

MALICIOUS

PDF

66.3 KB Created: 2021-02-28 10:32:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b0a1a41eeecc15b1a3062a9603004696 SHA-1: 0cbcc07569d91b25ed45bf18f360b473a2dee305 SHA-256: 6338348ea0aa7f1e48ddfd3acc9a951c26feb0acd052330246d72563421aa022
184 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
  • 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 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://yafferge.ru/wix?keyword=energy+forms+and+changes+simulation+worksheet In PDF document text
    • http://nuloriwilorij.scienceontheweb.net/instrumentos_para_la_recoleccion_de_datos_concepto.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/hornady_reloading_data_223.pdfIn PDF document text
    • http://reduslimer.website/25494962280b08qe.pdfIn PDF document text
    • https://punerumoluzes.weebly.com/uploads/1/3/4/8/134897399/96e74bfc.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/60176401189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384318/normal_5fc6d46075ea1.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/tuzapuxefawati.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378605/normal_5fc967f37ba9b.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/bunker_hill_color_security_system_with_night_vision_-_model_60565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_602460db62da2.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/7555577431.pdfIn PDF document text
    • https://rasazumeg.weebly.com/uploads/1/3/1/4/131454762/xovedizewuxametivet.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/batoragubukepo/anonymous_inner_class_in_android.pdfIn PDF document text
    • http://fojakosi.atwebpages.com/strange_pilgrims_ao3.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/budukaxoxudamiruvisujijuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/74966467010.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_off0000c57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57F 5648 bytes
SHA-256: 83f356dcc221a4d295ce13e1fdcfcbdb553178ae14b3894f6bcf1693a26ba1a4
font_01_sfnt_off0000d8b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B1 10408 bytes
SHA-256: 61f7c7c1699ee67c4a962ee3ea40d9232dacad7e016edb795e7c171cf84b9e2a