Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c1c4442e28b2627…

MALICIOUS

PDF

64.1 KB Created: 2021-02-23 18:13:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ea811e13e73c06f764af132540c4fd26 SHA-1: 92f3219c6bc8119e699b7710e55222ece5e29509 SHA-256: 8c1c4442e28b2627779506ae176ebe4d3a74ea693f9e37a176ded5998a6fd508
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://maypoin.ru/wix?keyword=imos+delivery+winghaven PDF link annotation
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/0aead572f8456a.pdfIn PDF document text
    • https://gisoroweri.weebly.com/uploads/1/3/4/8/134893792/54930120903b.pdfIn PDF document text
    • https://fopabitibomasad.weebly.com/uploads/1/3/1/8/131857723/a7bed2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_6012fc4238e5e.pdfIn PDF document text
    • https://zikepasut.weebly.com/uploads/1/3/4/1/134108801/9062364.pdfIn PDF document text
    • https://cdn.sqhk.co/fusulelibev/iXWiage/ashes_remain_on_my_own_song_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/kogujipubap/cWxpFjg/finowemelulizigunimubo.pdfIn PDF document text
    • http://yandex-delivery.cc/centipede_vs_millipede_comic82zt6.pdfIn PDF document text
    • http://myfoxing.online/dimolasiwogifkh1f2.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/BKjagf0/crunchyroll_premium_plus_benefits.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/UjaI4he/xowiwu.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/nufidibodudulad/contrato_de_confidencialidad_para_empleados.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/report_on_recommended_ppp_contractual_provisions.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_off0000beee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEEE 5428 bytes
SHA-256: 078fb08d90a53b75061a7bf5fcc1858e7080771179283ce495b7f4d5c3782ed4
font_01_sfnt_off0000d14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD14E 10208 bytes
SHA-256: 0f027d2403593c170e68785cfaa01eb69acbad0186d5bf6b44695db692207ab1