Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9581ab5a4d16ef4…

MALICIOUS

PDF

81.2 KB Created: 2021-03-11 07:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6ccf7c1b68d363e5363e5097cac70f75 SHA-1: bf9dc8daad2cd7ce2fa3850995e2c051a8d186b2 SHA-256: c9581ab5a4d16ef47ed9ef9b46cc6944374aac190dae2534d0d48deda4dd7ed4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. One prominent URL, 'https://ponafet.ru/123?utm_term=c+s+lewis+the+four+loves+pdf', suggests a phishing lure. The presence of external URIs and a link farm heuristic further supports the conclusion that this document is designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=c+s+lewis+the+four+loves+pdf PDF link annotation
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/88fb054dd4eb9.pdfIn PDF document text
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/pozutoxajuranukuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fced453ea9ae.pdfIn PDF document text
    • https://jawutasujo.weebly.com/uploads/1/3/0/9/130969833/2bbb3d.pdfIn PDF document text
    • https://cdn.sqhk.co/lagitesavap/agihYgj/agriculture_books_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/2ighfic/71185694110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505837/normal_6030d7eeb7a0a.pdfIn PDF document text
    • http://silver35.ru/edenpure_gen_2_not_heatingrof9m.pdfIn PDF document text
    • http://detonic-hypertonie.website/panolagoposolovepoprx83.pdfIn PDF document text
    • http://trastqort.online/modern_mathematical_statistics_with_applications_2nd_edition_solutionswy8x5.pdfIn PDF document text
    • http://hookup157.online/t-fal_deep_fryer_with_basket_fr8000tyntw.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/dljhwib/kairosoft_magicians_saga_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/iL39vic/95637208400.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/vutame/gipulujudow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5160bc91-cc2f-4eb9-a686-b52d67ffaf71/disney_cast_member_apartment_discounts_anaheim.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/algebraic_expressions_identities_class_8_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/054c07e9-d5b8-473e-9672-98d09c6f476c/97863556358.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/dilirezedarixomevusozat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1506938c-f770-4372-ba32-fc28adf18842/how_to_show_qualitative_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea6d58a-7694-4803-8aad-ba9f23750454/what_does_a_dappled_horse_look_like.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_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 4976 bytes
SHA-256: 0a45fb4ff077e7f6309446e045decf453231943380418e3c55f2e53b35981b56
font_01_sfnt_off00011315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11315 10564 bytes
SHA-256: e670eb270968472f548cac1ddc2e2e0a4334845bc833d6c88396747e116d8fa7

Open this report in the interactive analyzer, or submit your own file for analysis.