Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fd0cfb29996179…

MALICIOUS

PDF

57.2 KB Created: 2020-10-25 14:00:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: b0f507b2f50f9c01452abd26301dcb99 SHA-1: 64efd9b936f3576b50e13b701abcdf422db673ff SHA-256: b2fd0cfb29996179de931f7a463aa716d5585239091565023ea4eaf4513c1bc4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://gettraff.ru/123?keyword=a+biographical+sketch+of+an+infant+pdf In PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/jugogepebelulog_xeleja.pdfIn PDF document text
    • https://movidotibapokab.weebly.com/uploads/1/3/4/2/134265591/zovopasufile.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/puvil.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/420400.pdfIn PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/fejerupipix.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/kexuseludaliluv_zovuzadelet_demavumadiku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f8781477710e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f87ea625a793.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f878747bfdf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f92d28582f1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f8a75f197110.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009e99.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009e99.bin)
    • https://uploads.strikinglycdn.com/files/5ecb90e1-e678-4809-a460-ef5a50996446/fone_talon_de_cheque.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b401d00-0a13-41e3-836e-0ada009503dd/tokuwevidisa.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/bio_data_form_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/graphing_coordinates_pictures.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/67103051779.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/wasalefobup.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/psychoterapia_poznawczo_behawioralna_popiel_chomikuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65238750-ed41-40d3-a686-d801224cabba/jodoxogafodelit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/824fe16c-ba30-4ebc-971d-197072e97fec/fogeb.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_off00009e99.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E99 5612 bytes
SHA-256: 6c24bd43048b629ea562b6172ac674a41983337527ba5e24270aca79131a523a
font_01_sfnt_off0000b195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB195 11360 bytes
SHA-256: 23a04c8babc277db8dd1d33546b28b95441a1e479cfba714bf3a72f87c64394c