Malicious PDF — malware analysis report

Static analysis result for SHA-256 99825fafe3e7843b…

MALICIOUS

PDF

71.8 KB Created: 2021-03-01 12:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 85d9ac3e5bdb43e133604f30abd24042 SHA-1: 5a971da7250329e8dc2216b572e3dafa583480ab SHA-256: 99825fafe3e7843bb50708f39a399e710b01829df1a05fa65645c00daf09edb2
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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+draw+what+you+see+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4386330/normal_5ff482ee5c78a.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/student_goal_planning_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_6032fbd33db2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_5fd884564138e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480732/normal_601387720a9c6.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/jarawaxanivu/ubuntu_14._04_5.pdfIn PDF document text
    • http://popirarubinuluk.rf.gd/metastatic_melanoma_treatment_guidelines.pdfIn PDF document text
    • http://sukujarodapix.rf.gd/40346470165.pdfIn PDF document text
    • http://subugemorikeg.rf.gd/borderlight_app_for_android.pdfIn PDF document text
    • http://kofupugixujodin.epizy.com/pevijen.pdfIn PDF document text
    • http://kaxogesidod.epizy.com/15183139872.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/zalurigibaged.pdfIn PDF document text
    • http://dujibagakag.epizy.com/38997820605.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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 5252 bytes
SHA-256: a4d12441691ab759f741ac0312ba8ba74a31124ce3b197b61298b7eeba50bd75
font_01_sfnt_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 10088 bytes
SHA-256: d9fc8527a80df3b19b5b949ef40e3c619a4b18fe0906dd4b5964c543e94f1468