Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48309dce5848b6f…

MALICIOUS

PDF

80.3 KB Created: 2021-03-16 00:41:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6c7b6a6d625f2a38d94b378775a2ccbe SHA-1: bf9db3ef6b93123641dfde7b893867ccdd180b7c SHA-256: b48309dce5848b6f8168525ad31a0639bded0a487d40681e28fd3a92b8d4a787
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/strik?utm_term=kurzweil+pc88mx+price PDF link annotation
    • http://pro-gram.pro/pride_and_prejudice_movie_netflix_canada8xiri.pdfIn PDF document text
    • http://xolimaked.iblogger.org/excel_indirect_range_different_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393625/normal_6048d1a62d064.pdfIn PDF document text
    • http://straponartist.com/wefulegawokoganav75jqp.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/61363469388.pdfIn PDF document text
    • http://raifaisentapp.online/ms_dhoni_full_movie_hd_download_isaiminih39cf.pdfIn PDF document text
    • http://datiwufirul.medianewsonline.com/catalytic_reactions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445550/normal_602b85ebbe3f7.pdfIn PDF document text
    • http://moxilekulina.getenjoyment.net/convert_kindle_for_pc_to_free.pdfIn PDF document text
    • http://onlinetiser.website/889609438444ffek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fea078a6864d.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://uploads.strikinglycdn.com/files/31c91595-3710-4046-9d18-20333e9be1a7/parew.pdfIn PDF document text
    • http://wotidupodugi.myartsonline.com/biblia_takatifu_agano_jipya.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_f1de97b8fe0e42a1ba30ae78283f559f.pdf?index=trueIn PDF document text
    • http://jasukerubupir.epizy.com/analytics_platform_salesforce_license.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1dc0e5-e9af-420a-ad3d-578f25bebf2a/fepevojokopozirizekubaxal.pdfIn PDF document text
    • http://wetukanezin.atwebpages.com/54678437126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc59562f-e39f-48fc-b284-7f56a1dc0aa1/netgear_wgr614v7_als_access_point_konfigurieren.pdfIn PDF document text
    • http://kibulirol.rf.gd/nafugonolurofe.pdfIn PDF document text
    • https://858e1da1-ad31-4e5b-aec0-89c59c6c71f6.filesusr.com/ugd/6240f8_5c51a763b2a2490983171296a9c465f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf974372-a23b-4a71-b716-e4f01dd79fd4/49094162326.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 4648 bytes
SHA-256: 85e6a32fb11554c113196a748f5cf68a448231cd54b7c0971bdc7369d63729ad
font_01_sfnt_off0001005d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005D 11016 bytes
SHA-256: 81c5d8c3794ee342095085b9fb4797f2abc9e9a6518232ca810308a02e51cb60
font_02_sfnt_off00012601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12601 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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