Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dead83b59b768fc…

MALICIOUS

PDF

79.8 KB Created: 2021-03-30 13:36:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ee94e5b2b4895ef0aeef8a4f48c72e1c SHA-1: eda4ce4dbe9b7d08866f442fd38292c1087018c6 SHA-256: 0dead83b59b768fc015872f5f46e30b7de4be387698017c54b589ea18371bbd8
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/123?utm_term=astor+piazzolla+libertango+piano+duet+sheet+music PDF link annotation
    • https://cdn.sqhk.co/novimabe/jihdif7/3674061888.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/20027370641.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/fLAKpjc/blade_battle_box.pdfIn PDF document text
    • http://lg-supportteam.com/jbl_flip_3_bluetooth_pairing_windows_7ff6uq.pdfIn PDF document text
    • https://cdn.sqhk.co/bodorosuzuta/wl0frjb/84851020440.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/pdf_abortus_inkomplit.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/iOggdbM/best_of_sinach_songs_mp3.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/oregon_dmv_accident_report.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/aadhar_card_form_in_kannada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490370/normal_5ff7c8e760864.pdfIn PDF document text
    • http://saudiautoinsurance.com/15833210488abulh.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/ejercicios_de_limites_por_racionalizacion_resueltos.pdfIn PDF document text
    • http://leporabev.mywebcommunity.org/flowers_for_algernon_section_1_quiz_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/nebuwaxisiw/ibGGzji/diet_plan_bodybuilding.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/le_vocabulaire_de_largumentation_4amctnbz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410214/normal_602c3344277ee.pdfIn PDF document text
    • http://vash-fasad.live/how_much_is_a_2008_honda_civic895wx.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://5a8aee2d-3d68-4c09-98ed-743c9c56d6fd.filesusr.com/ugd/460efe_63f64125f04e4acf8ed66b00ca0353ec.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_4a58401f36d44f7a8acf6029958b416e.pdf?index=trueIn PDF document text
    • http://donufuruwitij.atwebpages.com/comprehensive_maths_textbook.pdfIn PDF document text
    • https://91c7bc9f-df77-4dbd-ae51-8bcf521f3e61.filesusr.com/ugd/1df9ea_91a72d874b2f491a890b2dc89e17724c.pdf?index=trueIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_1e8ca58deeee41e5992e6eae1ecbb69c.pdf?index=trueIn PDF document text
    • http://dejibokakar.onlinewebshop.net/finders_keepers_movie_2014_wiki.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_off0000e997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE997 5548 bytes
SHA-256: 9fe9103a34ddaa67699ea6fd1c921002a32b9606008f66ce2e3cdc917d466fe7
font_01_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 11788 bytes
SHA-256: dd322274644c03c763fa593d1f6d67e51a23235fa4a2079bff6d0a956d702ca1
font_02_sfnt_off00012464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12464 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3