Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e3146474e1f45e…

MALICIOUS

PDF

142.5 KB Created: 2021-03-20 08:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 64ffac6c36f10f16108f7ee368abe9de SHA-1: ede07aab409b752cd060664bf7e242adda8a2924 SHA-256: 06e3146474e1f45e90f4739168e6fd958182b02024effddac8407cee8ab7327f
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 domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

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://mezovuduw.ru/123?utm_term=square+enix+upcoming+android+games PDF link annotation
    • http://ericksandoval.com/how_to_setup_your_roku_streaming_stickah37s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485822/normal_60509b72656a1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5feb32da444b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369507/normal_5fe17d1aa3bb0.pdfIn PDF document text
    • https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/niful.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/betolifozal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_602ed207a17b4.pdfIn PDF document text
    • http://qlemelest.online/lulesuzoxasoa5l.pdfIn PDF document text
    • https://xigologilajuveb.weebly.com/uploads/1/3/4/6/134672854/nukevasirejatojexogu.pdfIn PDF document text
    • http://megesodore.iblogger.org/graphing_lines_in_standard_form_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_60265b784cc24.pdfIn PDF document text
    • https://befugusugub.weebly.com/uploads/1/3/2/6/132683140/f10ec00d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gomaxod/cancellation_letter_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/calypso_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c5d296-bd51-4801-9c1a-aed534f65a3e/journeys_grade_4_practice_book.pdfIn PDF document text
    • http://disefubukub.rf.gd/how_to_install_a_insinkerator_badger_5.pdfIn PDF document text
    • http://jewojaregoluwat.epizy.com/certificate_of_insurance_liability_form.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/criminal_case_supernatural_investigations.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/beauty_plus_app_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70eef1cf-9681-45aa-8d90-4a167af3cf77/free_wordpress_tutorial_for_beginners_step_by_step.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
stream_003_off000168eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x168EB 44828 bytes
SHA-256: eb8973239d7888528f89f84d73b787d6573728efdf4a0138d50199cdb206c759
font_01_sfnt_off0001f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F176 5660 bytes
SHA-256: 75c1117b31f9f2d6c4bc941ec7fc899ee7477f6634f33469ba0a847330d7e3ef
font_02_sfnt_off000204a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x204A5 11768 bytes
SHA-256: 8e850eb671ccc96927df1d82cf7dad9b4334edcd90ba755620780da092fb7408

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