Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f889c0cfb41419…

MALICIOUS

PDF

80.0 KB Created: 2021-03-16 23:27:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd80ff19d25c8098281e6a769482c147 SHA-1: 448ac7b83456cacbf5cc78b7f264b3c0b1c2bb9d SHA-256: 71f889c0cfb4141914d03d4a00d23ee98842c457cddad2ab306a5e0cf5225b36
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a phishing page or download further malware. The document body, though heavily obfuscated, contains strings that appear to be part of a lure related to a 'Maverick et-733 redi-check'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/strik?utm_term=maverick+et-733+redi-check
    • https://cdn.sqhk.co/jorisuzil/gjiehcw/simple_discounted_cash_flow_excel_template.pdf
    • https://cdn.sqhk.co/kobadaxo/faGFGhi/configure_pi_hole_ip.pdf
    • http://terugesit.iblogger.org/ray_bradbury_theatre_a_sound_of_thunder.pdf
    • http://kilijosizujowo.medianewsonline.com/why_do_i_ejaculate_different_amounts.pdf
    • https://cdn.sqhk.co/lixipadiwel/gjbggOy/visaxitef.pdf
    • https://cdn.sqhk.co/degavorofala/jmLhdko/tron_light_cycle_ride.pdf
    • http://banoduber.iblogger.org/21841151406.pdf
    • https://cdn.sqhk.co/fasazani/b3Z5ifF/slap_kings_game_play_free_online.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_955c169646f6426899b9121a236cacb7.pdf?index=true
    • http://divojeniro.epizy.com/baby_boy_names_in_tamil_with_meaning_and_numerology.pdf
    • https://ee897e78-a157-4eb5-8a47-d615096087a2.filesusr.com/ugd/113e89_6d54bbf8e1fb45b8bf5c3aa9dcd09258.pdf?index=true
    • https://c809e8a6-5bdf-489d-8d8c-df4e4638a115.filesusr.com/ugd/45a296_a9e80c23215d419da5897ba7d1678d4c.pdf?index=true
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_4f0fe4728df946c99fdffe5483c40fbb.pdf?index=true
    • https://4328a374-8b5c-4134-9cef-e132ca5fc89d.filesusr.com/ugd/6732b1_0fa683059b9b46aa9f93598725cbe799.pdf?index=true
    • http://nametelival.rf.gd/sims_4_parenthood.pdf
    • http://gukasitaxe.epizy.com/guided_imagery_benefits.pdf
    • https://s3.amazonaws.com/bulolimepol/gexidazemixeragudokun.pdf
    • https://s3.amazonaws.com/xapota/what_size_is_44_italian_in_us.pdf
    • http://sorofakomefus.epizy.com/modelo_de_entrevista_estructurada_psicologica.pdf
    • https://s3.amazonaws.com/tevomenil/wizadava.pdf
    • http://saxodanokijaj.atwebpages.com/ncert_maths_practice_book_class_6.pdf
    • http://jofiwevamixeta.epizy.com/forticlient_ems_administration_guide.pdf
    • http://pekomuvave.myartsonline.com/54930180104.pdf
    • http://gavofime.atwebpages.com/40865589744.pdf
    • http://musovulazapa.epizy.com/yahoo_finance_eurusd_historical_data.pdf
    • https://s3.amazonaws.com/vososasoxumete/bikodonovum.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faa4.bin
7c2350af2c7756b3f7cbb26b5abff5bd04e516f1f98319a41ad27d012cd92437		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA4 5224 bytes
font_01_sfnt_off00010c8a.bin
9775439d064ad91fb83476a4bcf083dd2806e0986bdb5665d4b0a57f94552213		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8A 11216 bytes

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