Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc6ca41f7ce81ee…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 00:11:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 27ef4edaf5d723dce244df50d0eee5bf SHA-1: 10b43fba1e03bc077bde487bffbe580518df9ab6 SHA-256: 0fc6ca41f7ce81ee4ab61902194f90eeebf2b85bfbd7bfb1d0f53c732bc52ca7
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=essential+idioms+in+english+answer+key PDF link annotation
    • http://movivuvafozor.iblogger.org/best_social_media_management_platform.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456687/normal_5fc8ad3377aef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_6026bd7963d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420599/normal_5ffa1b1b2d759.pdfIn PDF document text
    • http://storeyou.store/72651413837hylzy.pdfIn PDF document text
    • http://hushseo.online/bangla_tv_live_all_bd_channel_apkl0v8z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5feb328753405.pdfIn PDF document text
    • http://jopkapopka.online/beragip84ob.pdfIn PDF document text
    • http://akmurzina.com/chick_fil_a_team_memberh2a2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d8d691c7-cf48-432b-bece-a54604b57851.filesusr.com/ugd/1e3a4b_01bf0966caed4e25a32173268df077bb.pdf?index=trueIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_210157ebc6374da5a213607cec446d4d.pdf?index=trueIn PDF document text
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_6615530a544543769f690d7922d3137c.pdf?index=trueIn PDF document text
    • http://babijegogaluz.epizy.com/cowon_plenue_d_firmware.pdfIn PDF document text
    • http://kakedujeruvos.epizy.com/5196151954.pdfIn PDF document text
    • http://gazinopalevigem.rf.gd/property_investment_analysis_report_sample.pdfIn PDF document text
    • https://b1e6e3cd-24a2-426a-8b7d-e8f4bd81915b.filesusr.com/ugd/83e584_e85ea3984be245399c4e6588b0b4e3aa.pdf?index=trueIn PDF document text
    • https://87da31d5-d184-45e7-a456-0ad082c8bd65.filesusr.com/ugd/55e94a_04b53ae72e764d70ac6bdd95a31e2e2f.pdf?index=trueIn PDF document text
    • https://7e8267f5-6380-480e-ad72-df526eaefc07.filesusr.com/ugd/cbe325_9a2e82aa37c54136ac68afbbc0d61e11.pdf?index=trueIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_f14c1be681aa495083deba710af322a7.pdf?index=trueIn PDF document text
    • http://xawepimoj.epizy.com/63306716996.pdfIn PDF document text
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_aadd869f61e1472da67408ffc9e93dc3.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_21425ffd173d4600bf2b98c90fc2b56d.pdf?index=trueIn PDF document text
    • https://146c8b6c-0b46-450b-8ed0-b45f1e2a4974.filesusr.com/ugd/b58d21_02d447dbcc184a9c8ffa73c73da6e66a.pdf?index=trueIn 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_off0000ea46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA46 5452 bytes
SHA-256: b2008edb40a210934a6e4f96edea816239af8c5b3c41df5a7f753ff60d62ffb6
font_01_sfnt_off0000fcb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB8 10068 bytes
SHA-256: ea8795f818a3a89fd41c091612cc7b4546b1bcd7bb4cc2b9d9f974b8410af38d