Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be2370d58454eda…

MALICIOUS

PDF

75.7 KB Created: 2021-03-11 18:51:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: e16efbb4d29b2bb063b6c2eb75d076f5 SHA-1: 45ac99ee55332b7e7aae57807bab93fe49b61781 SHA-256: 0be2370d58454eda0f68d2f4712360752040ca28a0d36496f85c357168011e09
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain designed for link redirection and another to a disposable hosting service, suggesting an attempt to distribute further malicious content or phish for information. The document body, though heavily obfuscated, contains keywords related to downloading a PDF, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=book+of+symbols+pdf+download+english PDF link annotation
    • http://kevesojesofun.22web.org/nofugomilazalokefejun.pdfIn PDF document text
    • http://wasegulom.mygamesonline.org/37632378660.pdfIn PDF document text
    • http://tewatag.medianewsonline.com/37392173485.pdfIn PDF document text
    • http://jufobimagif.iblogger.org/krauss_maffei_wegmann_financial_report.pdfIn PDF document text
    • https://cdn.sqhk.co/vetejevibas/oHiiZK5/mexivatarejalegumomu.pdfIn PDF document text
    • http://fofolep.mywebcommunity.org/xavupenoxawuxenur.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/Xjarhja/45077531717.pdfIn PDF document text
    • http://jidokove.scienceontheweb.net/sokosarobidagetabizuxeg.pdfIn PDF document text
    • https://cdn.sqhk.co/senaveduwiz/iaihjea/chef_s_choice_manual_knife_sharpener_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_7247a0b2a3b54bf3a320d2faaeeed622.pdf?index=trueIn PDF document text
    • http://rususekobijo.myartsonline.com/6_claves_para_aprender_ingls_free_download.pdfIn PDF document text
    • http://bobamexexaru.rf.gd/galvanised_steel_sheet_sizes.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_b859246452114119b280b5c7480d4fd2.pdf?index=trueIn PDF document text
    • http://namakanexir.atwebpages.com/how_to_service_trojan_golf_cart_batteries.pdfIn PDF document text
    • http://nokonasaxe.epizy.com/sazodozelom.pdfIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_294fc4731f8948ebb171d9126ad83111.pdf?index=trueIn PDF document text
    • http://rilimopukalus.rf.gd/73142981332.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/app_keeps_stopping_android_studio.pdfIn PDF document text
    • http://vipotuzazaburew.rf.gd/how_to_clean_a_spotbot_hose.pdfIn PDF document text
    • http://metusajixano.epizy.com/correct_answer_if_you.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_off0000e7e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E2 5804 bytes
SHA-256: c262da5d1f204045672b5d08b454d41e4550087647e947ef151e912a3a1fa73b
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 11264 bytes
SHA-256: a9d803a93714b089c0b6a8adfba683716992f504137782591d160a4dc90b2f22

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