Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc09d5f6eeaf6a95…

MALICIOUS

PDF

34.7 KB Created: 2020-11-09 08:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 5cbd73c46334abb453a17439e6b7957c SHA-1: 58a2b50e955d2243922fa7c710017f5b87f652a5 SHA-256: fc09d5f6eeaf6a952c6abb40e26cf76f88f8e6b5e9654d896adc35213562d4ed
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafficel.ru/123?keyword=david+mclean+dr PDF link annotation
    • https://logukevagas.weebly.com/uploads/1/3/4/5/134507161/fdcb8b8d.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/612828.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/3753658.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372104/normal_5f8d241a3ee68.pdfIn PDF document text
    • https://bikukanod.weebly.com/uploads/1/3/4/5/134583710/berefugobovuz.pdfIn PDF document text
    • https://wimegipovuxu.weebly.com/uploads/1/3/4/3/134373819/vikewibojavele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lizobum89177026.files.wordpress.com/2020/11/pirugosokonevutalexi.pdfIn PDF document text
    • https://nuzobelesuli.files.wordpress.com/2020/11/41183637013.pdfIn PDF document text
    • https://diwalelofi.files.wordpress.com/2020/11/wudodirakisilagixere.pdfIn PDF document text
    • https://nudiverid.files.wordpress.com/2020/11/76106235092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9e93318-9549-4846-8464-ac5aaeb74b30/tafujogirixukuzefokumenof.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://nuzobelesuli.files.wordpress.com/2020/11/85728153399.pdfIn PDF document text
    • https://temobozuz.files.wordpress.com/2020/11/70802137755.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_off00004a78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A78 4964 bytes
SHA-256: b0c4e9e424d25522a5f9a0f19f0a3bdee156043f64723f33c81b1023cf89b440
font_01_sfnt_off00005b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B52 10308 bytes
SHA-256: b4d59b4a7fc20900685852851c24f3415721d5a1fc881ef229f9dee9dcb1f1aa