Malicious PDF — malware analysis report

Static analysis result for SHA-256 8795612cc494c23d…

MALICIOUS

PDF

92.4 KB Created: 2021-06-08 20:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 67abc44b6b2187603b35347dfd959d23 SHA-1: 7f36d00e77f5d59caf60deeed4cb57d104d97c43 SHA-256: 8795612cc494c23d0289da6365fc17bc7a6f6d331724b9639a66ab47d857b444
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The primary purpose appears to be directing users to a vast collection of other PDF documents, potentially for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://archism.ru/pbw?utm_term=dnd+random+character+sheet PDF link annotation
    • https://xurigaral.weebly.com/uploads/1/3/0/7/130738792/pumetesegekot_vajabez_tuzezonowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_60062bc088d93.pdfIn PDF document text
    • https://kipunelikerave.weebly.com/uploads/1/3/0/9/130969086/7651879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_604dddee26233.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/bogugolikineneki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420025/normal_5fcc41281910a.pdfIn PDF document text
    • https://madudezogimune.weebly.com/uploads/1/3/4/3/134326665/xalubati-ragogufurevom-lejewojinino.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_6052405449613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_602b6b89b507e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444852/normal_604494899511d.pdfIn PDF document text
    • https://petomikerip.weebly.com/uploads/1/3/2/3/132303099/1086f3c5d8c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421213/normal_5fdc620884682.pdfIn PDF document text
    • https://pamibatofenowa.weebly.com/uploads/1/3/4/5/134525539/vezunatomeropezuwula.pdfIn PDF document text
    • https://danawejenig.weebly.com/uploads/1/3/4/4/134499985/sitiwelom-rosusowesokorib-tinaxubituf-wetit.pdfIn PDF document text
    • https://bukusafirede.weebly.com/uploads/1/3/4/2/134266240/zanilejamebafuxazu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jitijaloj.pbworks.com/w/file/fetch/144631647/tamil_actress_name_list.pdfIn PDF document text
    • http://tanoroxamo.pbworks.com/w/file/fetch/144762198/95983970701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/354b19ea-cf99-468b-a7c2-62fbe9bad637/economic_development_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/171035a0-737f-438b-a481-e6aeac097971/who_is_project_zorgo_hacker.pdfIn PDF document text
    • http://beratirupo.pbworks.com/w/file/fetch/144875850/94355007720.pdfIn PDF document text
    • http://ditidema.pbworks.com/w/file/fetch/144603246/fibekajisajaveziko.pdfIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/144621681/62995996003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03118bbc-6331-4901-b2e9-f0e8aed5752b/graco_duoglider_rascal_target.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_off00012b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B6B 5144 bytes
SHA-256: 1ed05758e3177fb9779cff5e892877439cc225b917ac2ded1d929ab552cd0216
font_01_sfnt_off00013cc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC1 11424 bytes
SHA-256: 8f52507a9274b689e7238ee6e4c7ba748e3a3d33fd3eb8973229a286fa19ac47