Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5b5c861099ab58…

MALICIOUS

PDF

73.2 KB Created: 2021-01-21 11:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 66ed3cff98f74ffa91147596ba81d8c8 SHA-1: ea632247fbe0489c511fbb6a55fdd99793c24da8 SHA-256: ec5b5c861099ab586fcaa90005501bd607cde7ca85b19d0ba010163e9e373ddb
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wb?keyword=balloon%20arch%20prices%20near%20me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5faa5222d5345.pdfIn PDF document text
    • https://rasasagodum.weebly.com/uploads/1/3/2/3/132303335/gusonupes_kinisunoginexe.pdfIn PDF document text
    • https://tobotegitemusir.weebly.com/uploads/1/3/4/6/134651307/5413193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fd3883f943e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_5fa5a5891b673.pdfIn PDF document text
    • https://jifalutisapore.weebly.com/uploads/1/3/4/7/134772579/2763055.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f90eeb61f328.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_5fe774596908e.pdfIn PDF document text
    • https://xopavomubikun.weebly.com/uploads/1/3/4/8/134879687/8f891efffe63b.pdfIn PDF document text
    • https://keduwiwisa.weebly.com/uploads/1/3/4/4/134486116/zunomixobometa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447663/normal_5ffb931b7e0ba.pdfIn PDF document text
    • http://vinuporabomod.iblogger.org/tigakigurere.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/d78244c83981c.pdfIn PDF document text
    • https://vewuwoxefi.weebly.com/uploads/1/3/1/3/131379256/a656a489.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/pibabopuduj/family_household_chores_templates.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_off0000e171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE171 5224 bytes
SHA-256: 06b6d80fe04faf4bddb615bf9e7aa4a26d69ea7233544c519a32d24ed13299e5
font_01_sfnt_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 10932 bytes
SHA-256: ac14676e699c30f67a8404041bc67317f7062404a2eab039ac29603ed8c86ad4