Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ffc6d479b4dd615…

MALICIOUS

PDF

78.4 KB Created: 2021-03-10 01:57:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 055b017f998d330357ab9811d25f32f5 SHA-1: ea996003df4b2122a3157471563ac5a0c01c903b SHA-256: 0ffc6d479b4dd6151ebc4896995ada8ba60cb4419bc496f3faddcc069b6efa91
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to redirect users. The primary malicious URL identified is https://botokaw.ru/strik?utm_term=pok%25C3%25A9mon+sword+and+shield+strategy+guide+pdf, which is likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=pok%25C3%25A9mon+sword+and+shield+strategy+guide+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388422/normal_603506309c029.pdfIn PDF document text
    • http://lamovingcompany.com/59890651458ghi9s.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fee15d470ecb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_6032e904a672e.pdfIn PDF document text
    • http://flash-sar.online/singer_tiny_tailor_tt600_manuale_italiano2pjds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dac5db05-e5fb-4579-a2ef-c94dc76c47a5/aota_occupational_therapy_profile_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6167f40-c161-48f0-bf55-f68fa3143cf8/14558860314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d2ffc0-8ec1-48c5-a702-575b1bb24de7/xixifupuganurezowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbc86d6-3da2-49fe-8a2a-15d61dc8bb41/lasipo.pdfIn PDF document text
    • http://kodugexibitomo.rf.gd/pidotejovije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d0222d4-89e9-41cc-a023-e514758f3764/how_to_calculate_interest_on_late_payment_of_tds_in_excel.pdfIn PDF document text
    • https://95043331-d9de-4498-ad98-35b8ac3ee23f.filesusr.com/ugd/5740b2_9f54f113233041a3b27eabbb6ca81c05.pdf?index=trueIn PDF document text
    • https://a98f38e8-5810-4fc9-be6a-c3d78c7c4f9f.filesusr.com/ugd/921909_a3417aaf38b848f288ae4aa47c49a0df.pdf?index=trueIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_84a040156586430db896ae4d0c3af233.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a6f3b5a-9a3a-4a5d-bd3f-59f0e59d952f/what_is_knowledge_economy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5b33153-5a9e-458e-9a9d-36c4fc580d63/nuripusefanawezidimi.pdfIn PDF document text
    • http://mosujala.rf.gd/zopabix.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_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 5856 bytes
SHA-256: cf9f09df3f9174459aa95705b657c56199f59b53db6f67592109b122fa025cf5
font_01_sfnt_off0001058e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058E 10884 bytes
SHA-256: 2d2db4223dba0259a7132ab624cb465d7be909a54155f678505e34d11f1edddf

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