Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8ca375f4d9cc1bc…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 01:34:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a549d476f2e9730fbd895ccfd138e32f SHA-1: 2c7a330cfc78f9961964c79d19e9f38d499fcf23 SHA-256: a8ca375f4d9cc1bc8485cf6dc5408f2b71232a314659512a9d9435456aa6fee8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://jottigo.ru/award?keyword=how+to+run+code+in+microsoft+visual+basic+for+applications PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4480893/normal_5fcbac3d480ea.pdfIn PDF document text
    • http://esclub.pro/damunozitatugaxugejeviyhjie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_601d3e6faf773.pdfIn PDF document text
    • http://ideaita.fun/26550145330wvv3o.pdfIn PDF document text
    • https://zovakobazala.weebly.com/uploads/1/3/1/4/131456363/f83fa8b.pdfIn PDF document text
    • http://logvoz.ru/bankruptcy_rules_1969_malaysia99zia.pdfIn PDF document text
    • http://fapumew.22web.org/17626684277.pdfIn PDF document text
    • http://jubevodume.22web.org/maxaba.pdfIn PDF document text
    • https://nomukemometikuf.weebly.com/uploads/1/3/1/4/131483138/dbcf19422954b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416304/normal_5fee987edd1c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377909/normal_5fcc99381dedc.pdfIn PDF document text
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/1006990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385437/normal_603f06bc750d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411922/normal_5ffd6f2ca6eaa.pdfIn PDF document text
    • http://islandlandscapesbb.com/viwenijibigifojawidonomaft7nbh.pdfIn PDF document text
    • https://gidafefutor.weebly.com/uploads/1/3/4/0/134040883/rokaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb90d8513c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470545/normal_6004f90780d94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_602b56ccae470.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luzutajezilako.rf.gd/breville_smart_oven_air_with_super_convection_reviews.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_off0000e1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1AE 5556 bytes
SHA-256: d599863157f932cff7541fdc58e4726b5a51563e50626baf6288a3a2dda706be
font_01_sfnt_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 10032 bytes
SHA-256: e466e572c31f5b39fee555e835777f1fba4872fc034aa6f27c8c56b1ffdc4417

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