Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf3777acec0af606…

MALICIOUS

PDF

72.8 KB Created: 2021-02-25 01:46:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bc5881cf83c66c57c93bd3d3bf0aa7ff SHA-1: 30ceddde3fce6f96821bf9a7be4d3124fbc24acd SHA-256: bf3777acec0af60660dc590aab4eec7679f34540be315f0ce3bf53b4a783cc55
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wb?keyword=masterbuilt%20propane%20smoker%20recipes%20chicken PDF link annotation
    • https://mepowubufavi.weebly.com/uploads/1/3/4/8/134858245/vojorusizobuji-kikotifovires.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424010/normal_600dcfb830bf9.pdfIn PDF document text
    • http://penaleduduzib.iblogger.org/jezoraz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_60141458dbc61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_6036d6ebd1bec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383928/normal_5fde7097552b9.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/4033673.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464314/normal_603068d8a313e.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/lufasojogowetipowul.pdfIn PDF document text
    • https://xufaxasevejanog.weebly.com/uploads/1/3/4/8/134886042/3511672.pdfIn PDF document text
    • http://masuvanoleseg.iblogger.org/cover_of_the_latest_new_yorker_magazine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepavipa.epizy.com/83614890636.pdfIn PDF document text
    • http://zaxatuparogojix.epizy.com/bpt_audio_intercom_manual.pdfIn PDF document text
    • http://jigiwema.epizy.com/short_term_career_aspirations_answers.pdfIn PDF document text
    • http://judotopefov.rf.gd/burazaneridokak.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_off0000dfcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCF 5384 bytes
SHA-256: 9fafb7417f979fa54950543d998e357dafd81f7d157782f5223ac10358089aec
font_01_sfnt_off0000f1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FB 10752 bytes
SHA-256: 31dfc326833b4664ade6285e0b05517a779961fd51a46cd7d53c30d2a9c3d067