Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0f829d39b25f333…

MALICIOUS

PDF

59.9 KB Created: 2020-11-10 06:43:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3ff18d76d4b6d187aa4ec8c2582ef6ea SHA-1: 533bc882127c0a70dbc7966ce10c1780f5c7f3f4 SHA-256: a0f829d39b25f333eda7d5f1ec7abd6ab00d58ded4411384c5eb005f146e2686
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/123?keyword=levels+of+organization+worksheet+doc PDF link annotation
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/femokininara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401976/normal_5f96c9e468025.pdfIn PDF document text
    • https://nonudefetug.weebly.com/uploads/1/3/4/3/134314303/jenakewegizerot.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2560394.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5f9e4153ebd9d.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/bodusojobi.pdfIn PDF document text
    • https://sabovewedasujak.weebly.com/uploads/1/3/4/4/134493104/d40ffafef949.pdfIn PDF document text
    • https://tamoxukezoge.weebly.com/uploads/1/3/4/5/134585929/nimixorelijuxim_sijamug_taxotubebug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5f8d39e37b04a.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/wibedubosateg/gimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/bepogugesivujeka.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/rikanemovomatovozewi.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_off0000a849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA849 5488 bytes
SHA-256: 24b819d8027bb7443ddd4ba36e2c7511fc36f773c3e281e8b0afc08df4be909c
font_01_sfnt_off0000bb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB16 11924 bytes
SHA-256: 63df2007c57fc47553147b9b5f85b79bc925fa5fe181515c3d47410b5ff73904