Malicious PDF — malware analysis report

Static analysis result for SHA-256 8acddac733972663…

MALICIOUS

PDF

73.7 KB Created: 2021-02-11 01:15:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f37a2e20b54f3ca5eb40abdeb38be4ff SHA-1: b3628fe95baf4ddbd527f35b396a666903ce6a22 SHA-256: 8acddac733972663c9671f333b0b8eb4320c9970ca64df1551037436341fd80d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/aws?utm_term=letter+k+worksheets+cut+and+paste PDF link annotation
    • https://zuduwejigorim.weebly.com/uploads/1/3/5/3/135329148/vopup.pdfIn PDF document text
    • https://wuvalarovujed.weebly.com/uploads/1/3/4/2/134266489/6904542.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/avdiaS7/46910052089.pdfIn PDF document text
    • http://glasshookahcatering.com/powerbeats_3_manual_espaolb94nv.pdfIn PDF document text
    • https://cdn.sqhk.co/tamoravuwera/JcgdTWN/republique_dominicaine_carte_du_monde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371023/normal_5fe3a26cbecbb.pdfIn PDF document text
    • http://anstel.pro/gojolavibedaradudoksp0bi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380859/normal_5fe591daa27f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_602050836aad4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392199/normal_5fda422548c91.pdfIn PDF document text
    • http://zzzmmmmejjj.space/47661106279o822f.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/nifPHjc/29218967834.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/heijhnR/sodukup.pdfIn PDF document text
    • http://nashremont.site/37104862042cxm4m.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/bogeguva/vixop.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_off0000e02e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02E 5224 bytes
SHA-256: c8a61db5d5dc49d60dff3507c1eafdad9f62bc167dedc3479e106116c52297ff
font_01_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11788 bytes
SHA-256: 889054d8a9fbf19b731435d33f4f97df089babee2a7372449f407dc4b8fbb3f8