Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c373a6f571f11b…

MALICIOUS

PDF

68.8 KB Created: 2021-03-05 00:15:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8d0690e20ffde37d5c6d2f27edf4348c SHA-1: 8024b756846fe3f2d56dd8c48a15fab0b9a3d824 SHA-256: 79c373a6f571f11b7cb9058da27a5f6bb065136a89659d826b0a6d890e939bc3
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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=samsung+grand+prime+plus+frp+remove PDF link annotation
    • http://qiwi-wallet.online/solving_algebraic_fractions_worksheetv92ez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fff439fa31fd.pdfIn PDF document text
    • http://uplrezina.site/samsung_nu8500_curved_4k_uhd_smart_tv_55-inchr5smg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426071/normal_600033cf22938.pdfIn PDF document text
    • http://wildber.store/resumen_la_culpa_es_de_la_vaca_2336ln.pdfIn PDF document text
    • https://seremojalunukeb.weebly.com/uploads/1/3/5/3/135393353/be79fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_600c9a22e1bf9.pdfIn PDF document text
    • http://osmosiotzs.fun/budolamelesasawirilatphi98.pdfIn PDF document text
    • https://fafogefefotal.weebly.com/uploads/1/3/5/3/135314601/06a396a7c69e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5fd3bd308a46d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_5fd62c074f27b.pdfIn PDF document text
    • https://xaduxorabirot.weebly.com/uploads/1/3/4/4/134485234/xolafalix.pdfIn PDF document text
    • https://texodixoxi.weebly.com/uploads/1/3/1/8/131857215/964356.pdfIn PDF document text
    • https://sokuvefababadax.weebly.com/uploads/1/3/1/8/131856373/1462ed8.pdfIn PDF document text
    • https://jewukezi.weebly.com/uploads/1/3/0/9/130970006/74f0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453741/normal_6025fa13ea192.pdfIn PDF document text
    • http://copyrighthelp.info/completing_the_square_practice_problems_and_answersusb1e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_04eefc674e2a40a591611801a011bbcf.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_fbd7a850c8054b3e85a7e168c11532bd.pdf?index=trueIn 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_off0000d0e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E5 5524 bytes
SHA-256: 6be0b0e731920514703fa48c48ab5144ecaa83393cb755428b080fea1cb005ef
font_01_sfnt_off0000e39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39F 10024 bytes
SHA-256: 778b5dc718480b48fe9a2165fd049e06ab66eae100827b0fb040780b86aa5ff8