Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf3c2a061d724d3…

MALICIOUS

PDF

40.9 KB Created: 2020-11-03 13:34:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6144ac4442fba4592939a2fa8a96f57b SHA-1: e290042168424110d74dc13c7845e06f716b0554 SHA-256: bbf3c2a061d724d33efafd278d47a5ee06d6f54a975cd33e28e54aaa1e00c212
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/aws?keyword=12ax7+pin+diagram In PDF document text
    • https://lujadogube.weebly.com/uploads/1/3/4/5/134522393/5205788.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/sefaritonos-nukivafeka-retisebop-regaxumex.pdfIn PDF document text
    • https://jonoxuxiwef.weebly.com/uploads/1/3/4/3/134314506/6d30549550825.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/fidawijubuduroz.pdfIn PDF document text
    • https://daxusakisawepan.weebly.com/uploads/1/3/4/5/134527958/4be54be382e25a7.pdfIn PDF document text
    • https://lumodafudewose.weebly.com/uploads/1/3/4/4/134480169/rutuvetekuze-witusogipot.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/wujumoj-womivuzile-subejivanoge-werowubara.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/netulizox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366317/normal_5f920775d416f.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/8117365.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005f31.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005f31.bin)
    • https://s3.amazonaws.com/migivewuwe/14827043063.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/40171145790.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/manef.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 extracted file (font_00_sfnt_off00005f31.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F31 5304 bytes
SHA-256: 34a7f6c8b0c0366b79c30da25c6c9a2451e9b949726d60d40be608d351d11949
font_01_sfnt_off00007135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 11296 bytes
SHA-256: 2f439d253004601890b6a77a04d576236931fa0415376b1024535e74e4eb6440