Malicious PDF — malware analysis report

Static analysis result for SHA-256 a54ec9c830921760…

MALICIOUS

PDF

85.1 KB Created: 2021-03-28 20:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce19e11788b3dc841854c89aab816620 SHA-1: 537297296de56b2d73800ee16c2d265065263b86 SHA-256: a54ec9c830921760a729e2e3a1fcf678be15ec067a499c1fd8577739965f064e
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Ielts lexical resource pdf'. The presence of many links to disposable hosting and potentially malicious domains indicates an attempt to redirect users to harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://resalured.ru/award?keyword=ielts+lexical+resource+pdf
    • http://kizunawinim.getenjoyment.net/lubajurezesefobiwof.pdf
    • http://getsalon.xyz/4692157642k0jyl.pdf
    • https://wekasekizoturir.weebly.com/uploads/1/3/4/1/134131482/xufepaxiwuv.pdf
    • https://fixoxotogixas.weebly.com/uploads/1/3/4/3/134374926/wawut-sabos-likizosupawexe.pdf
    • https://cdn.sqhk.co/jogekiluse/5FhczZx/etisalat_business_contact_email.pdf
    • https://cdn-cms.f-static.net/uploads/4485329/normal_602daa0e49bec.pdf
    • http://azorocheat5.xyz/reasoning_question_in_gujaratiyqx3z.pdf
    • https://static.s123-cdn-static.com/uploads/4380405/normal_5fcf4e56b202d.pdf
    • http://pepariravifaza.getenjoyment.net/hp_officejet_4500_wireless_printing_setup.pdf
    • https://cdn-cms.f-static.net/uploads/4495391/normal_60305bd4a5fe8.pdf
    • http://copyrighthelpcentral.com/public_health_nutrition_course_outlinetq5fm.pdf
    • http://lemakomude.sportsontheweb.net/rofotosoxiku.pdf
    • http://feyakast.online/62453599748jn27h.pdf
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/4502801.pdf
    • http://ketosimple.online/msvcp140_dll_windows_8_freevt1km.pdf
    • https://fawubanine.weebly.com/uploads/1/3/4/3/134321827/5d704757.pdf
    • https://cdn.sqhk.co/kivipemo/CsqibHb/duzibadufefubonatamarukez.pdf
    • https://cdn-cms.f-static.net/uploads/4378405/normal_601a1bd689300.pdf
    • https://cdn-cms.f-static.net/uploads/4370307/normal_602dcf03ea295.pdf
    • http://xanejog.medianewsonline.com/medical_rep_cv.pdf
    • https://cdn.sqhk.co/segexiji/kGjaYx4/project_management_tools_and_techniques.pdf
    • https://jutarufuro.weebly.com/uploads/1/3/0/7/130775772/wekuxan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5cd03a9a-a416-49bb-8e1c-96bca93cc254/el_sistema_endocrino_esta_formado_por_glandulas_endocrinas.pdf
    • https://uploads.strikinglycdn.com/files/db7bf5b4-51b9-48fa-91dd-02a17f310b2f/74455995911.pdf
    • http://godusisoti.onlinewebshop.net/ionesco_la_cantatrice_calva.pdf
    • https://uploads.strikinglycdn.com/files/428f91f3-9d5a-4db8-9be0-83c04eef22c6/donulel.pdf
    • https://uploads.strikinglycdn.com/files/e47931db-0989-4544-8983-35a14dfc46c5/why_is_it_important_to_recycle_paper_and_cardboard.pdf
    • https://uploads.strikinglycdn.com/files/6f8028d7-1de1-4cce-8584-b6802dbd7c79/900_watt_microwave_good_enough.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001017b.bin
ffdb52202b4fd08b75af22e713b284087a90f2ca85450396b665f70cb113845d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 4928 bytes
font_01_sfnt_off00011255.bin
06d70d42b0a3749e3e592c04fe1f8c1ba685207c6ba399391c360d2e63ac7c3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11255 10720 bytes
font_02_sfnt_off000136fc.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x136FC 4324 bytes

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