Malicious PDF — malware analysis report

Static analysis result for SHA-256 c685d42f14e464ce…

MALICIOUS

PDF

62.5 KB Created: 2021-02-12 03:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 666c7751e75c2cfc1cece86133323512 SHA-1: ab8bc1ee3e676f6dd0b07deba9509ca60ad1fdd8 SHA-256: c685d42f14e464ce6216b23c8c344f4013a0e4c26959a7280e83bec98377ca37
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/wix?keyword=buffalo+ridge+elementary+cheyenne+wyoming PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388427/normal_60139fd163227.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/758022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448129/normal_5fdad0e8c0e84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459788/normal_60004055d7ca0.pdfIn PDF document text
    • http://ezfix.asia/free_joint_property_ownership_agreement_templatesahyo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383800/normal_6010f1a995d77.pdfIn PDF document text
    • https://bujakisuka.weebly.com/uploads/1/3/2/6/132695398/9499887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_6009f5ee8f3d5.pdfIn PDF document text
    • http://yildirimotobursa.com/cake_decorator_salary_in_californiahi2jq.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/nifurupijikukafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378393/normal_5fff6a571b064.pdfIn PDF document text
    • https://botiwugagow.weebly.com/uploads/1/3/1/8/131872238/rupelikibudepi-posawifitapa-penisebop-kifoxiteku.pdfIn PDF document text
    • http://adv-workshop.site/hide_photo_video_app_apkaukpx.pdfIn PDF document text
    • http://ewop.space/attendo_risposta_in_inglese_formale0sq35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xifenarubomes.rf.gd/zemovasidubupo.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_off0000b81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB81C 5500 bytes
SHA-256: 65779a628d274100ea07c7cd0fadff0855fbd4f8a8bd04f02a71e95b10513727
font_01_sfnt_off0000cac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC5 10064 bytes
SHA-256: e1f7995ba4050198a2adb29b30c0024776cf72e8ab887f2290c3ed668949659f