Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9a841521ec4799…

MALICIOUS

PDF

73.1 KB Created: 2021-02-15 14:19:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0fe09aa62f2b96d33d6c7d1703f5ae63 SHA-1: d4918794d36f89483665bca5bedcb8c7f7bff354 SHA-256: 3f9a841521ec4799d23eaa6ff798eded4cb4b2c8cc5d222fc2d94a98a7a3e934
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://druttle.ru/wix?keyword=pickaway+county+common+pleas+court+circleville+oh PDF link annotation
    • https://lekomuge.weebly.com/uploads/1/3/4/7/134773229/penorowejuguk.pdfIn PDF document text
    • https://feposogasutam.weebly.com/uploads/1/3/1/3/131384530/xopikagifusiwotenowe.pdfIn PDF document text
    • https://menufaron.weebly.com/uploads/1/3/0/7/130775522/82f16f0d.pdfIn PDF document text
    • https://kowexemi.weebly.com/uploads/1/3/1/8/131872048/segotojudal.pdfIn PDF document text
    • https://vufupobuzalezu.weebly.com/uploads/1/3/4/8/134853030/vobebibegex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377663/normal_5ff23e0c61d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5fe8f5c59fd7b.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/1487350.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufuripisaren.epizy.com/aluminium_sheet_weight_calculator.pdfIn PDF document text
    • http://badizep.epizy.com/84546164816.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/maxesidobefesufexigifop.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/assignment_abroad_times_28_september_2019.pdfIn PDF document text
    • http://zifawikixeliba.epizy.com/locking_specific_cells_in_excel_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/valuj.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_off0000df08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF08 5492 bytes
SHA-256: 85cd69bfa175cebcde6abf7a3cd6777a83622a7225992a3c52a7cc2a8e4ebce3
font_01_sfnt_off0000f1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AA 10980 bytes
SHA-256: bbb1c89f812722d9dd8c622768d48e5c6883223bd33bbef8c22a2827806416aa