Malicious PDF — malware analysis report

Static analysis result for SHA-256 bee154ddb1ccc272…

MALICIOUS

PDF

87.2 KB Created: 2021-04-14 18:10:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91ac6492f4442b90d7e68db2c2500639 SHA-1: 626b2b25940fc2498f0408e6098487230e52d36a SHA-256: bee154ddb1ccc272acafc465f8c2cfbec9bd0b9d44d0bff56763e0f694e913bf
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it's designed to host many links on disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL patterns strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://pelibifir.ru/strik?utm_term=their+eyes+were+watching+god+chapter+19+theme
    • http://sexekovowo.iblogger.org/marriage_d_amour_partitura_piano.pdf
    • https://cdn-cms.f-static.net/uploads/4414864/normal_60485c36b6ed4.pdf
    • https://cdn-cms.f-static.net/uploads/4481695/normal_604bbd3d53984.pdf
    • https://subolamamojoga.weebly.com/uploads/1/3/4/7/134719430/fc22492af.pdf
    • https://static.s123-cdn-static.com/uploads/4457839/normal_60036296dbd1d.pdf
    • http://wodaretibinusad.22web.org/guzoxavoram.pdf
    • https://static.s123-cdn-static.com/uploads/4371010/normal_6008b1c340042.pdf
    • https://cdn-cms.f-static.net/uploads/4454550/normal_602080101226b.pdf
    • https://xitupiwe.weebly.com/uploads/1/3/4/4/134489196/896850.pdf
    • https://cdn-cms.f-static.net/uploads/4380522/normal_601b4451de8eb.pdf
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/defofoduxeg-tabepe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/2c970d10-3e4c-414b-a9d4-e5ad0b5c3333/indian_stock_market_live_software_free_download.pdf
    • http://dobisesine.epizy.com/bixowogetinulotimumof.pdf
    • https://486bfeb6-87d8-40a3-812f-3449909c9139.filesusr.com/ugd/81b904_2d6c46e7fb264e019fe52c72e3add56e.pdf?index=true
    • https://1a447ccf-a6a5-490c-ad31-399ae8169532.filesusr.com/ugd/cf5184_871a398efd8440ec8f2354b4b5046cc3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/212c933c-53a5-4429-80c3-b15c27fb4115/10848713519.pdf
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_84620fef41de4483bd8db8696aa7223f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ff504ba5-a283-4c83-8ec1-5ec28d4f722a/taxozabu.pdf
    • https://025b4bf0-2906-4f5f-8a0f-6d4b68fc9518.filesusr.com/ugd/148ee2_8bbd5bd3f562493a9c0e1c66eee920cf.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5bc08370-6cfd-4649-b9cb-c2569db434f8/titiboriwexori.pdf
    • http://durakukulutozar.epizy.com/arabic_language_course_in_urdu.pdf
    • https://uploads.strikinglycdn.com/files/5c96a183-8b0a-42b1-84bd-26b54a8fc631/sketchup_2015_app_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001172a.bin
1519aa5b70723efa318cdec8a9758a246489f37fd0589b188fcd0dcc59bcd685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1172A 5804 bytes
font_01_sfnt_off00012ae5.bin
df8fe7acd0c4198eff625d87ea8f6faabca14fd36fb40a6d96ea1ca590058dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE5 10504 bytes

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