Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cbb25baf6d480b9…

MALICIOUS

PDF

98.8 KB Created: 2021-04-20 22:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: beb79743ab2aa2d6ce23c449d502300c SHA-1: 2137410660552f941b2f799fd3b824db50b96b41 SHA-256: 1cbb25baf6d480b9ffc1de52343fa5c246953e9fcef09ac0d361bc9274808830
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one specifically pointing to 'kuzutuzo.ru/strik' and using a search term related to dehydrator trays. This suggests a phishing or scam attempt to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://kuzutuzo.ru/strik?utm_term=cabela%2527s+dehydrator+fruit+leather+trays PDF link annotation
    • http://vuwadezizubem.22web.org/soxoviletitazuje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_602cf3db3b3c4.pdfIn PDF document text
    • https://cdn.sqhk.co/jopuromug/hdhehjd/nabupa.pdfIn PDF document text
    • https://cdn.sqhk.co/koxuvusu/shdbvig/84732726475.pdfIn PDF document text
    • http://zekabivalejasaj.22web.org/wuwalonopitofum.pdfIn PDF document text
    • https://cdn.sqhk.co/dawezizupata/a4ghZRj/totaboduwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486051/normal_603370c347cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_601991adbd094.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456712/normal_5fdfffd84d7a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_602753548c566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_6049d8e5e6f19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413703/normal_5fcd19506c102.pdfIn PDF document text
    • https://cdn.sqhk.co/kadefowuvun/ijbq62C/sokolawog.pdfIn PDF document text
    • https://cdn.sqhk.co/dimusokobab/GBgixxL/diabetes_treatment_guidelines_algorithm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c6926203-1eb9-401e-9afa-11f61f201807.filesusr.com/ugd/685707_3a67ae58079649168807d9e042135c49.pdf?index=trueIn PDF document text
    • https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_97328bd633e94b5e8a4caad90f87f76f.pdf?index=trueIn PDF document text
    • http://sasugud.rf.gd/99722983534.pdfIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_282d361cbc334bd99f4b7a93ef8d213c.pdf?index=trueIn PDF document text
    • http://vewawukeko.epizy.com/67572812253.pdfIn PDF document text
    • http://kadinox.epizy.com/patuponovawil.pdfIn PDF document text
    • https://e3c65705-3664-417e-97b1-2ac29bfab8bd.filesusr.com/ugd/6a5da5_939f3c76867c4ec8a956b4c94b859ffb.pdf?index=trueIn PDF document text
    • http://pepawelifebin.rf.gd/9076860504.pdfIn PDF document text
    • https://99ca13e2-8bf0-45b2-93fa-bbfb519f101f.filesusr.com/ugd/5392be_d820f859788a497a817b8a573c5b9e55.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001347b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 5072 bytes
SHA-256: e64bfa15661d97e944e7241eb5807a6c0384ee25934a8decb97e496ae228de05
font_01_sfnt_off000145d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D9 12624 bytes
SHA-256: 590982ea624eda5df7c8c190b873407691332b60a98f4c3ed69f5c58d9e26424
font_02_sfnt_off00016fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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