Malicious PDF — malware analysis report

Static analysis result for SHA-256 327bea22696ed362…

MALICIOUS

PDF

69.7 KB Created: 2021-03-04 22:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7ecb17f40e011eeec0bf1185157f4759 SHA-1: 415c1d73b9fa3c85744f300600db63e8452023ce SHA-256: 327bea22696ed362cbafd011d94f32cb1e4ad8f0eee74aabec8b6d44502651d3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=definitive+guide+to+dax+amazon PDF link annotation
    • http://navalny.design/python_basic_authentication_encodewf4pg.pdfIn PDF document text
    • http://fotuxeji.iblogger.org/4849553994.pdfIn PDF document text
    • http://puzigodemabotod.iblogger.org/22175413103.pdfIn PDF document text
    • http://zitokujamu.mypressonline.com/gekupajitinaw.pdfIn PDF document text
    • http://strgb2.ru/fojorelisusapobudalowzuzm.pdfIn PDF document text
    • http://pay-order.info/panasonic_kx-tgp500_reset_passworda95ea.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/jvhaBhb/gipudumuvudun.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/ji1iejg/nozoxi.pdfIn PDF document text
    • https://cdn.sqhk.co/zevivovakok/ges3jjT/escape_game_lab_sentier.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/71780487354.pdfIn PDF document text
    • https://cdn.sqhk.co/mivoteloxip/4gfbvpa/sup_multiplayer_racing_apk_latest_version.pdfIn PDF document text
    • http://tokepubex.getenjoyment.net/20307529039.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/pl_sql_sqlplus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01879ec6-84a8-4315-9862-c41c208eeb0f/what_is_included_in_an_hr_audit.pdfIn PDF document text
    • http://jemileti.atwebpages.com/jikoromof.pdfIn PDF document text
    • http://xizuzaziz.rf.gd/microsoft_project_gantt_template.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/42343950734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a2aeb14-64ce-4fc8-9346-6b57aa47a1ea/can_i_book_a_road_test_during_covid.pdfIn PDF document text
    • http://rivelik.epizy.com/hotstar_app_free_for_pc.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD471 5100 bytes
SHA-256: fa84b94f3fddaf14f3dfed90fb0258544a1e27941d72de2fd1871ffe67312540
font_01_sfnt_off0000e5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 10576 bytes
SHA-256: 596a01659fccd6c8c822e827fca3e77147a36bd4374b967bbc971c87bacb41d0

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