Malicious PDF — malware analysis report

Static analysis result for SHA-256 0237bbec02375f8a…

MALICIOUS

PDF

85.6 KB Created: 2021-03-20 18:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 396f3019faa49c72a7fcc78af25495df SHA-1: ddba48cdd419504a684965d06aab26d3cb1e0abc SHA-256: 0237bbec02375f8af89ba1d27a4dc4be1b2558c11074b3b0fe5d06a354036daf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a prominent one leading to 'kuzutuzo.ru' and another to 'cdn.sqhk.co', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a large number of links on disposable hosting, reinforcing the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=how+do+i+reset+my+admiral+washing+machine PDF link annotation
    • https://cdn.sqhk.co/pixefavenar/idXgihc/ladarigoluboxepoz.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/ropoxapu.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/eQTMTge/fabfitfun_fall_2020_spoilers_3.pdfIn PDF document text
    • http://bojidodug.iblogger.org/game_dev_tycoon_apk_revdl.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/dutakivevavurugezereb.pdfIn PDF document text
    • https://vutameko.weebly.com/uploads/1/3/4/5/134576445/e8d1dacf9312.pdfIn PDF document text
    • https://tizezesi.weebly.com/uploads/1/3/4/0/134041120/jekurex.pdfIn PDF document text
    • https://zesawomu.weebly.com/uploads/1/3/4/3/134321331/139c5a6.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/jk1iffX/hospital_heart_rate_monitor_cost.pdfIn PDF document text
    • http://pemovixo.iblogger.org/individual_student_support_plan_template.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/graco_pack_n_play_quick_connect_fitted_sheet.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/60490929978.pdfIn PDF document text
    • http://vutunema.mypressonline.com/ge_toaster_oven_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusexezoti.epizy.com/zesupubixotububozom.pdfIn PDF document text
    • http://mogixos.atwebpages.com/12620225742.pdfIn PDF document text
    • http://lebevinawefebo.rf.gd/allstar_performance_aluminum_sheet.pdfIn PDF document text
    • http://kenesowozowojaw.myartsonline.com/7249913673.pdfIn PDF document text
    • http://wexejof.epizy.com/bypass_paywall_android.pdfIn PDF document text
    • http://pizidera.rf.gd/lusedurisebiv.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/can_someone_use_stolen_airpods_without_the_case.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 5508 bytes
SHA-256: abff9249ff52d243ecb0ffbd47e706484392cb308626058586034082e92de82a
font_01_sfnt_off00010e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E85 10840 bytes
SHA-256: 01878baff800fdad495b85e283fb911f93c00414cf29322bb248f78775da35ed
font_02_sfnt_off00013384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 16148 bytes
SHA-256: d612c605d101522a7b082cd092ef78b209dae850c4a5e940dd0f53fb1bc5669f

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