Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6423e5bc8635cb9…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 05:26:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2d24889c80fac1d86ec5c6a9b74cd3f3 SHA-1: 1e6084f691ff03ef71a58ecc47e4f804bcf8a076 SHA-256: b6423e5bc8635cb9d83fd46dc078ee325b46b5efc1e9cfefe0853ab928cba976
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=how+to+reset+check+engine+light+2003+chevy+silverado PDF link annotation
    • https://cdn.sqhk.co/kisesawaropo/hadgi68/66193210310.pdfIn PDF document text
    • https://revunisukigi.weebly.com/uploads/1/3/4/8/134849871/jubajoxid_lobukime.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/ieCjfZQ/merikifuten.pdfIn PDF document text
    • https://votebefi.weebly.com/uploads/1/3/4/7/134715150/nikudezerawap.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/8169678.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/jMhjfez/tumblr_light_wallpaper.pdfIn PDF document text
    • https://wudatoguji.weebly.com/uploads/1/3/4/8/134885495/9688598.pdfIn PDF document text
    • https://dugufenejoropez.weebly.com/uploads/1/3/0/7/130775504/punajebesewose-ninowamofel-vimopojod-fapidum.pdfIn PDF document text
    • http://guitar.su/fuvimofabojevojupadojov4kror.pdfIn PDF document text
    • https://cdn.sqhk.co/kufezagivori/igi4jdL/psycho_bunny_store.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/gidqc1c/sokolisudizonupiwixebenas.pdfIn PDF document text
    • http://ridunculus.com/vexakubul2bsj5.pdfIn PDF document text
    • http://becloud.website/1575187345237bzh.pdfIn PDF document text
    • https://vazarilixigoro.weebly.com/uploads/1/3/1/6/131636807/jelinelubol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379601/normal_5ffae371a0d46.pdfIn PDF document text
    • https://bokosemebejira.weebly.com/uploads/1/3/0/8/130813317/bigijenojovififusori.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 5916 bytes
SHA-256: a6c6140e50fe3491c6301bcf10a84275640ca6ba745e3e6b784790d41fe754e5
font_01_sfnt_off0000f1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BF 10116 bytes
SHA-256: 9a89e9a7ce53aef287c0c81e027f8abb9abde347732cd33c7b3a9a1baf4d94c3