Malicious PDF — malware analysis report

Static analysis result for SHA-256 8458df4c62bcac6b…

MALICIOUS

PDF

77.9 KB Created: 2021-02-25 10:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 319d584707e953f8023f2742a745125d SHA-1: 3eb7288f9458c5326e2fadf9ac89ce2c2c12163d SHA-256: 8458df4c62bcac6bf6b43962cf0de1944710a1b86d04519519c10d6da734ef5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/aws?utm_term=what+percentage+pass+cfa+level+1 PDF link annotation
    • https://cdn.sqhk.co/rabovafom/Angijbe/boximemifobivimamu.pdfIn PDF document text
    • http://lnstagramverificationbadge.com/how_to_use_the_bissell_little_green_proheat_turbo_brush3zi73.pdfIn PDF document text
    • https://biputivaninude.weebly.com/uploads/1/3/1/4/131438500/nudoveko_jajenewo_wonifox_zewolilewup.pdfIn PDF document text
    • http://dowosateti.iblogger.org/4735503270.pdfIn PDF document text
    • http://storedubai.shop/86621313634effl6.pdfIn PDF document text
    • https://cdn.sqhk.co/bobimugura/fhf8hjf/condado_puerto_rico_hotels_marriott.pdfIn PDF document text
    • http://kprovk.xyz/39976143482vhvmd.pdfIn PDF document text
    • https://texifafotolatip.weebly.com/uploads/1/3/4/7/134764930/sodufa_sorakan_tejiro.pdfIn PDF document text
    • https://dajexuxeguse.weebly.com/uploads/1/3/4/8/134859846/2223803.pdfIn PDF document text
    • https://pafazemewo.weebly.com/uploads/1/3/4/5/134517711/wesakutiwafu-resuro-vonikaferape.pdfIn PDF document text
    • https://cdn.sqhk.co/rubutemoxe/bejbggi/46391014384.pdfIn PDF document text
    • http://fruitik.space/gdpr_breach_reporting_guidancel260c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tawaxinazaka.rf.gd/sort_excel_spreadsheet_numerically.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/vuxavigasobigokilaxevibiz.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/duxalos.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/bejeweled_game_free_for_mobile.pdfIn PDF document text
    • http://fogomagof.epizy.com/sirijojukafofukese.pdfIn PDF document text
    • https://s3.amazonaws.com/jimugivos/piwadazidosugelolozepegev.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/the_office_pilot_script.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/beco_baby_carrier_gemini_manual.pdfIn PDF document text
    • http://ligexaxo.epizy.com/google_form_check_spreadsheet.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_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 5400 bytes
SHA-256: b92b5ecd9933c05dc398ff25e7ecf07a631c3293a6abbd34322751fd770f53e3
font_01_sfnt_off000104e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E6 10988 bytes
SHA-256: 729964c709da3ef77cb59d06494d194ec0203c0bc366c33ac6ebf0f828bb8167

Open this report in the interactive analyzer, or submit your own file for analysis.